Merge branch 'master' into column-ui/master

Conflicts:
	README.md
	test/test_list_format.py
	topydo/cli/CLIApplicationBase.py
	topydo/lib/Config.py
	topydo/lib/Utils.py

CONTRIBUTING.md

@@ -43,10 +43,6 @@ smoothly into topydo.
                exit 1
            fi
       
-          if ! python2 -m pylint --errors-only topydo test; then
-              exit 1
-          fi
-      
           if ! python3 -m pylint --errors-only topydo test; then
               exit 1
           fi

README.md

@@ -26,22 +26,24 @@ Simply install with:
 
     pip install topydo
 
-### Optional dependencies
+### Dependencies
+
+* [arrow][8]          : Used to turn dates into a human readable version.
+
+#### Optional dependencies:
 
 * [icalendar][7]      : To print your todo.txt file as an iCalendar file
-                        (not supported for Python 3.2).
+                        (not supported for PyPy3).
 * [prompt-toolkit][6] : For topydo's _prompt_ mode, which offers a shell-like
                         interface with auto-completion.
+* [arrow][8]          : Used to turn dates into a human readable version.
 * [urwid][12]         : For topydo's _columns_ mode, a TUI with columns for
                         your todo items.
-* [arrow][8]          : Used to turn dates into a human readable version.
 * [backports.shutil_get_terminal_size][9] : Used to determine your terminal
                                             window size. This function was
                                             added to the standard library in
                                             Python 3.3 and so is only
-                                            required in older versions of
-                                            Python.
-* [python-dateutil][10]: A dependency of *arrow*.
+                                            required for PyPy3.
 * [mock][11]          : Used for testing. This was added to the standard
                         library in Python 3.3.
 

test/command_testcase.py

@@ -20,7 +20,7 @@ from topydo.lib.Utils import escape_ansi
 
 class CommandTest(TopydoTest):
     def __init__(self, *args, **kwargs):
-        super(CommandTest, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.output = ""
         self.errors = ""
 

test/data/aliases.conf

@@ -4,3 +4,4 @@ baz = FooBar
 format = ls -F "|I| x c d {(}p{)} s k" -n 25
 smile = ls ☻
 star = tag {} star 1
+quot = lol'd

test/test_add_command.py

@@ -33,7 +33,7 @@ except ImportError:
 
 class AddCommandTest(CommandTest):
     def setUp(self):
-        super(AddCommandTest, self).setUp()
+        super().setUp()
         self.todolist = TodoList.TodoList([])
         self.today = date.today().isoformat()
 

test/test_append_command.py

@@ -23,7 +23,7 @@ from topydo.lib.TodoList import TodoList
 
 class AppendCommandTest(CommandTest):
     def setUp(self):
-        super(AppendCommandTest, self).setUp()
+        super().setUp()
         self.todolist = TodoList([])
         self.todolist.add("Foo")
 

test/test_delete_command.py

@@ -33,7 +33,7 @@ def _no_prompt(self):
 
 class DeleteCommandTest(CommandTest):
     def setUp(self):
-        super(DeleteCommandTest, self).setUp()
+        super().setUp()
         todos = [
             "Foo id:1",
             "Bar p:1",

test/test_dep_command.py

@@ -23,7 +23,7 @@ from topydo.lib.TodoList import TodoList
 
 class DepCommandTest(CommandTest):
     def setUp(self):
-        super(DepCommandTest, self).setUp()
+        super().setUp()
         todos = [
             "Foo id:1",
             "Bar p:1",

test/test_depri_command.py

@@ -23,7 +23,7 @@ from topydo.lib.TodoList import TodoList
 
 class DepriCommandTest(CommandTest):
     def setUp(self):
-        super(DepriCommandTest, self).setUp()
+        super().setUp()
         todos = [
             "(A) Foo",
             "Bar",

test/test_do_command.py

@@ -32,7 +32,7 @@ def _no_prompt(self):
 
 class DoCommandTest(CommandTest):
     def setUp(self):
-        super(DoCommandTest, self).setUp()
+        super().setUp()
         todos = [
             "Foo id:1",
             "Bar p:1",

test/test_edit_command.py

@@ -33,7 +33,7 @@ except ImportError:
 
 class EditCommandTest(CommandTest):
     def setUp(self):
-        super(EditCommandTest, self).setUp()
+        super().setUp()
         todos = [
             "Foo id:1",
             "Bar p:1 @test",

test/test_filter.py

@@ -301,7 +301,7 @@ class FilterTest(TopydoTest):
 
 class OrdinalTagFilterTest(TopydoTest):
     def setUp(self):
-        super(OrdinalTagFilterTest, self).setUp()
+        super().setUp()
 
         today = date.today()
         tomorrow = today + timedelta(1)
@@ -381,7 +381,7 @@ class OrdinalTagFilterTest(TopydoTest):
 
 class CreationFilterTest(TopydoTest):
     def setUp(self):
-        super(CreationFilterTest, self).setUp()
+        super().setUp()
 
         self.todo1 = "2015-12-19 With creation date."
         self.todo2 = "Without creation date."
@@ -415,7 +415,7 @@ class CreationFilterTest(TopydoTest):
 
 class CompletionFilterTest(TopydoTest):
     def setUp(self):
-        super(CompletionFilterTest, self).setUp()
+        super().setUp()
 
         self.todo1 = "2015-12-19 With creation date."
         self.todo2 = "x 2015-12-19 2015-12-18 Without creation date."
@@ -459,7 +459,7 @@ class CompletionFilterTest(TopydoTest):
 
 class PriorityFilterTest(TopydoTest):
     def setUp(self):
-        super(PriorityFilterTest, self).setUp()
+        super().setUp()
 
         self.todo1 = "(A) Foo"
         self.todo2 = "(B) Bar"

test/test_get_sub_command.py

@@ -21,9 +21,8 @@ from topydo.Commands import get_subcommand
 from topydo.commands.AddCommand import AddCommand
 from topydo.commands.DeleteCommand import DeleteCommand
 from topydo.commands.ListCommand import ListCommand
-from topydo.commands.ListProjectCommand import ListProjectCommand
 from topydo.commands.TagCommand import TagCommand
-from topydo.lib.Config import config
+from topydo.lib.Config import config, ConfigError
 
 class GetSubcommandTest(TopydoTest):
     def test_normal_cmd(self):
@@ -120,6 +119,15 @@ class GetSubcommandTest(TopydoTest):
         real_cmd, final_args = get_subcommand(args)
         self.assertEqual(real_cmd, None)
 
+    def test_alias_quotation(self):
+        config("test/data/aliases.conf")
+
+        args = ["quot"]
+        with self.assertRaises(ConfigError) as ce:
+            get_subcommand(args)
+
+        self.assertEqual(str(ce.exception), 'No closing quotation')
+
     def test_help(self):
         real_cmd, final_args = get_subcommand(['help', 'nonexisting'])
         self.assertFalse(real_cmd)

test/test_graph.py

@@ -22,7 +22,7 @@ from topydo.lib.Graph import DirectedGraph
 
 class GraphTest(TopydoTest):
     def setUp(self):
-        super(GraphTest, self).setUp()
+        super().setUp()
 
         self.graph = DirectedGraph()
 

test/test_list_command.py

@@ -35,7 +35,7 @@ except ImportError:
 
 class ListCommandTest(CommandTest):
     def setUp(self):
-        super(ListCommandTest, self).setUp()
+        super().setUp()
         self.todolist = load_file_to_todolist("test/data/ListCommandTest.txt")
         self.terminal_size = namedtuple('terminal_size', ['columns', 'lines'])
 
@@ -397,7 +397,7 @@ class ListCommandTest(CommandTest):
 
 class ListCommandUnicodeTest(CommandTest):
     def setUp(self):
-        super(ListCommandUnicodeTest, self).setUp()
+        super().setUp()
         self.todolist = load_file_to_todolist("test/data/ListCommandUnicodeTest.txt")
 
     def test_list_unicode1(self):

test/test_list_format.py

@@ -36,7 +36,7 @@ except ImportError:
 @freeze_time("2015, 11, 06")
 class ListFormatTest(CommandTest):
     def setUp(self):
-        super(ListFormatTest, self).setUp()
+        super().setUp()
         self.todolist = load_file_to_todolist("test/data/ListFormat.txt")
         self.terminal_size = namedtuple('terminal_size', ['columns', 'lines'])
 
@@ -132,7 +132,7 @@ class ListFormatTest(CommandTest):
         command.execute()
 
         result = """|  1| D Bar @Context1 +Project2                (3 months ago, due a month ago, started a month ago)
-|  2| Z Lorem ipsum dolorem sit amet. Red @f... lazy:bar (just now, due in 2 days, starts in a day)
+|  2| Z Lorem ipsum dolorem sit amet. Red @fox ... lazy:bar (today, due in 2 days, starts in a day)
 |  3| C Foo @Context2 Not@Context +Project1 Not+Project                              (4 months ago)
 |  4| C Baz @Context1 +Project1 key:value
 |  5| Drink beer @ home
@@ -183,7 +183,7 @@ x 2014-12-12
         command.execute()
 
         result = """3 months ago | a month ago | a month ago |
-just now | in 2 days | in a day |
+today | in 2 days | in a day |
 4 months ago | | |
 | | |
 | | |
@@ -278,7 +278,7 @@ just now | in 2 days | in a day |
         command.execute()
 
         result = """3 months ago
-just now
+today
 4 months ago
 
 
@@ -330,7 +330,7 @@ due in 2 days, starts in a day
         command.execute()
 
         result = """3 months ago, due a month ago, started a month ago
-just now, due in 2 days, starts in a day
+today, due in 2 days, starts in a day
 4 months ago
 
 
@@ -697,5 +697,19 @@ C -
 """
         self.assertEqual(self.output, result)
 
+    def test_list_format46(self):
+        command = ListCommand(["-x", "-F", "%r"], self.todolist, self.out, self.error)
+        command.execute()
+
+        result = """(D) 2015-08-31 Bar @Context1 +Project2 due:2015-09-30 t:2015-09-29
+(Z) 2015-11-06 Lorem ipsum dolorem sit amet. Red @fox +jumped over the lazy:bar and jar due:2015-11-08 t:2015-11-07
+(C) 2015-07-12 Foo @Context2 Not@Context +Project1 Not+Project
+(C) Baz @Context1 +Project1 key:value
+Drink beer @ home id:1 p:2 ical:foobar
+x 2014-12-12 Completed but with date:2014-12-12
+"""
+        self.assertEqual(self.output, result)
+
+
 if __name__ == '__main__':
     unittest.main()

test/test_postpone_command.py

@@ -24,7 +24,7 @@ from topydo.lib.TodoList import TodoList
 
 class PostponeCommandTest(CommandTest):
     def setUp(self):
-        super(PostponeCommandTest, self).setUp()
+        super().setUp()
         self.today = date.today()
         self.past = date.today() - timedelta(1)
         self.future = date.today() + timedelta(1)

test/test_priority_command.py

@@ -23,7 +23,7 @@ from topydo.lib.TodoList import TodoList
 
 class PriorityCommandTest(CommandTest):
     def setUp(self):
-        super(PriorityCommandTest, self).setUp()
+        super().setUp()
         todos = [
             "(A) Foo",
             "Bar",

test/test_recurrence.py

@@ -25,7 +25,7 @@ from topydo.lib.Todo import Todo
 
 class RecurrenceTest(TopydoTest):
     def setUp(self):
-        super(RecurrenceTest, self).setUp()
+        super().setUp()
         self.todo = Todo("Test rec:1w")
         self.stricttodo = Todo("Test rec:+1w")
 

test/test_relative_date.py

@@ -15,7 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
-from datetime import date, timedelta
+from datetime import date
 from freezegun import freeze_time
 
 from test.topydo_testcase import TopydoTest
@@ -25,7 +25,7 @@ from topydo.lib.RelativeDate import relative_date_to_date
 @freeze_time('2015, 11, 06')
 class RelativeDateTester(TopydoTest):
     def setUp(self):
-        super(RelativeDateTester, self).setUp()
+        super().setUp()
         self.yesterday = date(2015, 11, 5)
         self.today = date(2015, 11, 6)
         self.tomorrow = date(2015, 11, 7)
@@ -40,6 +40,18 @@ class RelativeDateTester(TopydoTest):
         result = relative_date_to_date('1d')
         self.assertEqual(result, self.tomorrow)
 
+    def test_zero_bdays(self):
+        result = relative_date_to_date('0b')
+        self.assertEqual(result, self.today)
+
+    def test_one_bday(self):
+        result = relative_date_to_date('1b')
+        self.assertEqual(result, self.monday)
+
+    def test_one_bweek(self):
+        result = relative_date_to_date('5b')
+        self.assertEqual(result, self.friday)
+
     def test_one_week(self):
         result = relative_date_to_date('1w')
         self.assertEqual(result, date(2015, 11, 13))
@@ -152,6 +164,14 @@ class RelativeDateTester(TopydoTest):
         result = relative_date_to_date('-0d')
         self.assertTrue(result, self.today)
 
+    def test_negative_period3(self):
+        result = relative_date_to_date('-1b')
+        self.assertEqual(result, date(2015, 11, 5))
+
+    def test_negative_period4(self):
+        result = relative_date_to_date('-5b')
+        self.assertEqual(result, date(2015, 10, 30))
+
     def test_weekday_next_week(self):
         """
         When entering "Friday" on a Friday, return next week Friday instead of

test/test_revert_command.py

@@ -35,7 +35,7 @@ from topydo.lib.TodoList import TodoList
 
 class RevertCommandTest(CommandTest):
     def setUp(self):
-        super(RevertCommandTest, self).setUp()
+        super().setUp()
         todos = [
             "Foo",
             "Bar",

test/test_sort_command.py

@@ -24,7 +24,7 @@ from topydo.lib.Config import config
 
 class SortCommandTest(CommandTest):
     def setUp(self):
-        super(SortCommandTest, self).setUp()
+        super().setUp()
         self.todolist = load_file_to_todolist("test/data/SorterTest1.txt")
 
     def test_sort1(self):

test/test_tag_command.py

@@ -24,7 +24,7 @@ from topydo.lib.TodoList import TodoList
 
 class TagCommandTest(CommandTest):
     def setUp(self):
-        super(TagCommandTest, self).setUp()
+        super().setUp()
         todos = [
             "Foo",
             "Bar due:2014-10-22",

test/test_todo_list.py

@@ -29,7 +29,7 @@ from topydo.lib.TodoListBase import InvalidTodoException, TodoListBase
 
 class TodoListTester(TopydoTest):
     def setUp(self):
-        super(TodoListTester, self).setUp()
+        super().setUp()
 
         self.todofile = TodoFile('test/data/TodoListTest.txt')
         lines = [line for line in self.todofile.read()
@@ -219,6 +219,13 @@ class TodoListTester(TopydoTest):
         config("test/data/todolist-uid.conf")
         self.assertRaises(InvalidTodoException, self.todolist.todo, 1)
 
+    def test_uid4(self):
+        """
+        Handle UIDs properly when line numbers are configured.
+        """
+        config(p_overrides={('topydo', 'identifiers'): 'linenumber'})
+        self.assertRaises(InvalidTodoException, self.todolist.todo, '11a')
+
     def test_new_uid(self):
         """ Make sure that item has new text ID after append. """
         config("test/data/todolist-uid.conf")
@@ -227,10 +234,23 @@ class TodoListTester(TopydoTest):
 
         self.assertNotEqual(self.todolist.number(todo), 't5c')
 
+    def test_iteration(self):
+        """ Confirms that the iternation method is working. """
+        results = ["(C) Foo @Context2 Not@Context +Project1 Not+Project",
+                   "(D) Bar @Context1 +Project2",
+                   "(C) Baz @Context1 +Project1 key:value",
+                   "(C) Drink beer @ home",
+                   "(C) 13 + 29 = 42"]
+
+        i = 0
+        for todo in self.todolist:
+            self.assertEqual(todo.src, results[i])
+            i += 1
+
 
 class TodoListDependencyTester(TopydoTest):
     def setUp(self):
-        super(TodoListDependencyTester, self).setUp()
+        super().setUp()
 
         self.todolist = TodoList([])
         self.todolist.add("Foo id:1")
@@ -242,6 +262,7 @@ class TodoListDependencyTester(TopydoTest):
         self.todolist.add("Another one with +Project")
         self.todolist.add("Todo with +AnotherProject")
         self.todolist.add("Todo without children id:3")
+        self.todolist.add("Orphan p:4")
 
     def test_check_dep(self):
         children = self.todolist.children(self.todolist.todo(1))
@@ -272,8 +293,8 @@ class TodoListDependencyTester(TopydoTest):
         todo5 = self.todolist.todo(5)
         self.todolist.add_dependency(todo5, todo4)
 
-        self.assertTrue(todo5.has_tag('id', '4'))
-        self.assertTrue(todo4.has_tag('p', '4'))
+        self.assertTrue(todo5.has_tag('id', '5'))
+        self.assertTrue(todo4.has_tag('p', '5'))
 
     def test_add_dep2(self):
         """
@@ -287,8 +308,8 @@ class TodoListDependencyTester(TopydoTest):
         self.todolist.add_dependency(todo5, todo4)
         self.todolist.add_dependency(todo4, todo1)
 
-        self.assertTrue(todo4.has_tag('id', '5'))
-        self.assertTrue(todo1.has_tag('p', '5'))
+        self.assertTrue(todo4.has_tag('id', '6'))
+        self.assertTrue(todo1.has_tag('p', '6'))
 
     def test_add_dep3(self):
         """
@@ -322,6 +343,7 @@ class TodoListDependencyTester(TopydoTest):
 
         self.assertFalse(from_todo.has_tag('id'))
         self.assertFalse(to_todo.has_tag('p'))
+        self.assertFalse(self.todolist.todo_by_dep_id('2'))
 
     def test_remove_dep2(self):
         old = str(self.todolist)
@@ -330,6 +352,9 @@ class TodoListDependencyTester(TopydoTest):
         self.todolist.remove_dependency(from_todo, to_todo)
 
         self.assertEqual(str(self.todolist), old)
+        self.assertTrue(self.todolist.todo_by_dep_id('1'))
+        self.assertTrue(self.todolist.todo_by_dep_id('2'))
+        self.assertTrue(self.todolist.todo_by_dep_id('3'))
 
     def test_remove_dep3(self):
         """ Try to remove non-existing dependency. """
@@ -339,6 +364,9 @@ class TodoListDependencyTester(TopydoTest):
         self.todolist.remove_dependency(from_todo, to_todo)
 
         self.assertEqual(str(self.todolist), old)
+        self.assertTrue(self.todolist.todo_by_dep_id('1'))
+        self.assertTrue(self.todolist.todo_by_dep_id('2'))
+        self.assertTrue(self.todolist.todo_by_dep_id('3'))
 
     def test_remove_todo_check_children(self):
         todo = self.todolist.todo(2)
@@ -351,6 +379,7 @@ class TodoListDependencyTester(TopydoTest):
         todo = self.todolist.todo(3)
         self.todolist.delete(todo)
         self.assertFalse(todo.has_tag('p', '2'))
+        self.assertFalse(self.todolist.todo_by_dep_id('2'))
 
         todo = self.todolist.todo(1)
         children = self.todolist.children(todo)
@@ -372,6 +401,20 @@ class TodoListDependencyTester(TopydoTest):
         self.assertTrue(todolist.todo_by_dep_id('1'))
         self.assertFalse(todolist.todo_by_dep_id('2'))
 
+    def test_add_after_dependencies(self):
+        """
+        Test that information is properly stored after dependency related
+        information was retrieved from the todo list.
+        """
+        todo = self.todolist.todo(1)
+        self.todolist.parents(todo)
+
+        self.todolist.add('New dependency id:99')
+        self.todolist.add('Child p:99')
+
+        self.assertTrue(self.todolist.dirty)
+        self.assertTrue(self.todolist.todo_by_dep_id('99'))
+
 
 class TodoListCleanDependencyTester(TopydoTest):
     """
@@ -383,7 +426,7 @@ class TodoListCleanDependencyTester(TopydoTest):
     """
 
     def setUp(self):
-        super(TodoListCleanDependencyTester, self).setUp()
+        super().setUp()
         self.todolist = TodoList([])
 
     def test_clean_dependencies1(self):
@@ -419,19 +462,7 @@ class TodoListCleanDependencyTester(TopydoTest):
         self.todolist.clean_dependencies()
 
         self.assertFalse(self.todolist.todo(1).has_tag('id'))
-
-    def test_clean_dependencies4(self):
-        """ Clean p: items when siblings are still connected to parent. """
-        self.todolist.add("Foo id:1")
-        self.todolist.add("Bar p:1")
-        self.todolist.add("Baz p:1 id:2")
-        self.todolist.add("Buzz p:2 p:1")
-
-        self.todolist.clean_dependencies()
-
-        self.assertFalse(self.todolist.todo(4).has_tag('p', '1'))
-        self.assertTrue(self.todolist.todo(1).has_tag('id', '1'))
-        self.assertTrue(self.todolist.todo(2).has_tag('p', '1'))
+        self.assertFalse(self.todolist.todo_by_dep_id('1'))
 
 
 if __name__ == '__main__':

topydo/Commands.py

@@ -21,7 +21,7 @@ instance based on an argument list.
 
 import sys
 
-from topydo.lib.Config import config
+from topydo.lib.Config import config, ConfigError
 
 _SUBCOMMAND_MAP = {
     'add': 'AddCommand',
@@ -90,7 +90,11 @@ def get_subcommand(p_args):
         If alias resolves to non-existent command, main help message is
         returned.
         """
+        try:
             real_subcommand, alias_args = alias_map[p_alias]
+        except ValueError as ve:
+            raise ConfigError(alias_map[p_alias]) from ve
+
         try:
             result = import_subcommand(real_subcommand)
             args = join_args(p_args, alias_args)

topydo/cli/CLI.py

@@ -41,7 +41,7 @@ class CLIApplication(CLIApplicationBase):
     """
 
     def __init__(self):
-        super(CLIApplication, self).__init__()
+        super().__init__()
 
     def run(self):
         """ Main entry function. """
@@ -50,7 +50,11 @@ class CLIApplication(CLIApplicationBase):
         self.todofile = TodoFile.TodoFile(config().todotxt())
         self.todolist = TodoList.TodoList(self.todofile.read())
 
+        try:
             (subcommand, args) = get_subcommand(args)
+        except ConfigError as ce:
+            error('Error: ' + str(ce) + '. Check your aliases configuration')
+            sys.exit(1)
 
         if subcommand is None:
             self._usage()

topydo/cli/CLIApplicationBase.py

@@ -226,9 +226,9 @@ class CLIApplicationBase(object):
         to the todo.txt file.
         """
 
+        if self.todolist.dirty:
             # do not archive when the value of the filename is an empty string
             # (i.e. explicitly left empty in the configuration
-        if self.todolist.dirty:
             if self.do_archive and config().archive():
                 self._archive()
 

topydo/cli/Prompt.py

@@ -59,7 +59,7 @@ class PromptApplication(CLIApplicationBase):
     """
 
     def __init__(self):
-        super(PromptApplication, self).__init__()
+        super().__init__()
 
         self._process_flags()
         self.mtime = None
@@ -95,11 +95,20 @@ class PromptApplication(CLIApplicationBase):
                                     completer=self.completer,
                                     complete_while_typing=False)
                 user_input = shlex.split(user_input)
-            except (EOFError, KeyboardInterrupt):
+            except EOFError:
                 sys.exit(0)
+            except KeyboardInterrupt:
+                continue
+            except ValueError as verr:
+                error('Error: ' + str(verr))
 
             mtime_after = _todotxt_mtime()
+
+            try:
                 (subcommand, args) = get_subcommand(user_input)
+            except ConfigError as ce:
+                error('Error: ' + str(ce) + '. Check your aliases configuration')
+                continue
 
             # refuse to perform operations such as 'del' and 'do' if the
             # todo.txt file has been changed in the background.

topydo/commands/AddCommand.py

@@ -34,7 +34,7 @@ class AddCommand(Command):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(AddCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
         self.text = ' '.join(p_args)
         self.from_file = None
@@ -119,7 +119,7 @@ class AddCommand(Command):
 
     def execute(self):
         """ Adds a todo item to the list. """
-        if not super(AddCommand, self).execute():
+        if not super().execute():
             return False
 
         self.printer.add_filter(PrettyPrinterNumbers(self.todolist))

topydo/commands/AppendCommand.py

@@ -24,11 +24,11 @@ class AppendCommand(Command):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(AppendCommand, self).__init__(p_args, p_todolist, p_out, p_err,
+        super().__init__(p_args, p_todolist, p_out, p_err,
                 p_prompt)
 
     def execute(self):
-        if not super(AppendCommand, self).execute():
+        if not super().execute():
             return False
 
         try:

topydo/commands/ArchiveCommand.py

@@ -27,7 +27,7 @@ class ArchiveCommand(Command):
         TodoListBase class which does no dependency checking, so a better
         choice for huge done.txt files.
         """
-        super(ArchiveCommand, self).__init__([], p_todolist)
+        super().__init__([], p_todolist)
         self.archive = p_archive_list
 
     def execute(self):

topydo/commands/DeleteCommand.py

@@ -22,7 +22,7 @@ class DeleteCommand(DCommand):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(DeleteCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
     def prompt_text(self):

topydo/commands/DepCommand.py

@@ -28,7 +28,7 @@ class DepCommand(Command):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(DepCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
         try:
@@ -109,7 +109,7 @@ class DepCommand(Command):
             self.error(self.usage())
 
     def execute(self):
-        if not super(DepCommand, self).execute():
+        if not super().execute():
             return False
 
         dispatch = {

topydo/commands/DepriCommand.py

@@ -23,7 +23,7 @@ class DepriCommand(MultiCommand):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(DepriCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
     def _execute_multi_specific(self):

topydo/commands/DoCommand.py

@@ -33,17 +33,17 @@ class DoCommand(DCommand):
         self.strict_recurrence = False
         self.completion_date = date.today()
 
-        super(DoCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
     def get_flags(self):
         """ Additional flags. """
-        opts, long_opts = super(DoCommand, self).get_flags()
+        opts, long_opts = super().get_flags()
 
         return ("d:s" + opts, ["date=", "strict"] + long_opts)
 
     def process_flag(self, p_opt, p_value):
-        super(DoCommand, self).process_flag(p_opt, p_value)
+        super().process_flag(p_opt, p_value)
 
         if p_opt == "-s" or p_opt == "--strict":
             self.strict_recurrence = True

topydo/commands/EditCommand.py

@@ -39,7 +39,7 @@ def _is_edited(p_orig_mtime, p_file):
 
 class EditCommand(MultiCommand):
     def __init__(self, p_args, p_todolist, p_output, p_error, p_input):
-        super(EditCommand, self).__init__(p_args, p_todolist, p_output,
+        super().__init__(p_args, p_todolist, p_output,
                                           p_error, p_input)
 
         if len(self.args) == 0:

topydo/commands/ExitCommand.py

@@ -26,11 +26,11 @@ class ExitCommand(Command):
     """
 
     def __init__(self, p_args, p_todolist, p_output, p_error, p_input):
-        super(ExitCommand, self).__init__(p_args, p_todolist, p_output, p_error,
+        super().__init__(p_args, p_todolist, p_output, p_error,
                                           p_input)
 
     def execute(self):
-        if not super(ExitCommand, self).execute():
+        if not super().execute():
             return False
 
         sys.exit(0)

topydo/commands/ListCommand.py

@@ -28,7 +28,7 @@ class ListCommand(ExpressionCommand):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(ListCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
         self.printer = None
@@ -92,7 +92,7 @@ class ListCommand(ExpressionCommand):
         Additional filters to select particular todo items given with the -i
         flag.
         """
-        filters = super(ListCommand, self)._filters()
+        filters = super()._filters()
 
         if self.ids:
             def get_todo(p_id):
@@ -122,7 +122,6 @@ class ListCommand(ExpressionCommand):
             # create a standard printer with some filters
             indent = config().list_indent()
             final_format = ' ' * indent + self.format
-            hidden_tags = config().hidden_tags()
 
             filters = []
             filters.append(PrettyPrinterFormatFilter(self.todolist, final_format))
@@ -132,7 +131,7 @@ class ListCommand(ExpressionCommand):
         self.out(self.printer.print_list(self._view().todos))
 
     def execute(self):
-        if not super(ListCommand, self).execute():
+        if not super().execute():
             return False
 
         try:

topydo/commands/ListContextCommand.py

@@ -22,11 +22,11 @@ class ListContextCommand(Command):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(ListContextCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
     def execute(self):
-        if not super(ListContextCommand, self).execute():
+        if not super().execute():
             return False
 
         for context in sorted(self.todolist.contexts(), key=lambda s: s.lower()):

topydo/commands/ListProjectCommand.py

@@ -22,11 +22,11 @@ class ListProjectCommand(Command):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(ListProjectCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
     def execute(self):
-        if not super(ListProjectCommand, self).execute():
+        if not super().execute():
             return False
 
         for project in sorted(self.todolist.projects(), key=lambda s: s.lower()):

topydo/commands/PostponeCommand.py

@@ -28,7 +28,7 @@ class PostponeCommand(MultiCommand):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(PostponeCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
         self.move_start_date = False

topydo/commands/PriorityCommand.py

@@ -26,7 +26,7 @@ class PriorityCommand(MultiCommand):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(PriorityCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
         self.last_argument = True

topydo/commands/RevertCommand.py

@@ -25,11 +25,11 @@ class RevertCommand(Command):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(RevertCommand, self).__init__(p_args, p_todolist, p_out, p_err,
+        super().__init__(p_args, p_todolist, p_out, p_err,
                 p_prompt)
 
     def execute(self):
-        if not super(RevertCommand, self).execute():
+        if not super().execute():
             return False
 
         archive_file = TodoFile.TodoFile(config().archive())

topydo/commands/SortCommand.py

@@ -24,11 +24,11 @@ class SortCommand(Command):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(SortCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
     def execute(self):
-        if not super(SortCommand, self).execute():
+        if not super().execute():
             return False
 
         try:

topydo/commands/TagCommand.py

@@ -26,7 +26,7 @@ class TagCommand(Command):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(TagCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
         self.force = False
@@ -124,7 +124,7 @@ class TagCommand(Command):
         self._print()
 
     def execute(self):
-        if not super(TagCommand, self).execute():
+        if not super().execute():
             return False
 
         self._process_args()

topydo/lib/Command.py

@@ -71,8 +71,8 @@ class Command(object):
         """ Retrieves a value from the argument list at the given position. """
         try:
             return self.args[p_number]
-        except IndexError:
-            raise InvalidCommandArgument
+        except IndexError as ie:
+            raise InvalidCommandArgument from ie
 
     def getopt(self, p_flags, p_long=None):
         p_long = p_long or []

topydo/lib/Config.py

@@ -354,10 +354,13 @@ class _Config:
         alias_dict = dict()
 
         for alias, meaning in aliases:
+            try:
                 meaning = shlex.split(meaning)
                 real_subcommand = meaning[0]
                 alias_args = meaning[1:]
                 alias_dict[alias] = (real_subcommand, alias_args)
+            except ValueError as verr:
+                alias_dict[alias] = str(verr)
 
         return alias_dict
 
@@ -404,7 +407,7 @@ def config(p_path=None, p_overrides=None):
         try:
             config.instance = _Config(p_path, p_overrides)
         except configparser.ParsingError as perr:
-            raise ConfigError(str(perr))
+            raise ConfigError(str(perr)) from perr
 
     return config.instance
 

topydo/lib/DCommand.py

@@ -31,7 +31,7 @@ class DCommand(MultiCommand):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(DCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
         self.force = False

topydo/lib/ExpressionCommand.py

@@ -32,7 +32,7 @@ class ExpressionCommand(Command):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(ExpressionCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
         self.sort_expression = config().sort_string()

topydo/lib/Filter.py

@@ -62,7 +62,7 @@ class GrepFilter(Filter):
     """ Matches when the todo text contains a text. """
 
     def __init__(self, p_expression, p_case_sensitive=None):
-        super(GrepFilter, self).__init__()
+        super().__init__()
 
         # convert to string in case we receive integers
         self.expression = p_expression
@@ -96,13 +96,15 @@ class RelevanceFilter(Filter):
     """
 
     def match(self, p_todo):
-        is_due = p_todo.is_active()
-        is_due |= p_todo.due_date() == None
-        is_due |= p_todo.priority() == 'A'
-        is_due |= p_todo.priority() == 'B' and p_todo.days_till_due() <= 30
-        is_due |= p_todo.priority() == 'C' and p_todo.days_till_due() <= 14
+        active = p_todo.is_active()
 
-        return p_todo.is_active() and is_due
+        is_due = active
+        is_due = is_due or p_todo.due_date() == None
+        is_due = is_due or p_todo.priority() == 'A'
+        is_due = is_due or (p_todo.priority() == 'B' and p_todo.days_till_due() <= 30)
+        is_due = is_due or (p_todo.priority() == 'C' and p_todo.days_till_due() <= 14)
+
+        return active and is_due
 
 
 class DependencyFilter(Filter):
@@ -115,7 +117,7 @@ class DependencyFilter(Filter):
         Pass on a TodoList instance such that the dependencies can be
         looked up.
         """
-        super(DependencyFilter, self).__init__()
+        super().__init__()
         self.todolist = p_todolist
 
     def match(self, p_todo):
@@ -138,7 +140,7 @@ class InstanceFilter(Filter):
 
         This is handy for constructing a view given a plain list of Todo items.
         """
-        super(InstanceFilter, self).__init__()
+        super().__init__()
         self.todos = p_todos
 
     def match(self, p_todo):
@@ -154,7 +156,7 @@ class InstanceFilter(Filter):
 
 class LimitFilter(Filter):
     def __init__(self, p_limit):
-        super(LimitFilter, self).__init__()
+        super().__init__()
         self.limit = p_limit
 
     def filter(self, p_todos):
@@ -167,7 +169,7 @@ class OrdinalFilter(Filter):
     """ Base class for ordinal filters. """
 
     def __init__(self, p_expression, p_pattern):
-        super(OrdinalFilter, self).__init__()
+        super().__init__()
 
         self.expression = p_expression
 
@@ -206,7 +208,7 @@ _ORDINAL_TAG_MATCH = r"(?P<key>[^:]*):" + _OPERATOR_MATCH + _VALUE_MATCH
 
 class OrdinalTagFilter(OrdinalFilter):
     def __init__(self, p_expression):
-        super(OrdinalTagFilter, self).__init__(p_expression, _ORDINAL_TAG_MATCH)
+        super().__init__(p_expression, _ORDINAL_TAG_MATCH)
 
     def match(self, p_todo):
         """
@@ -247,7 +249,7 @@ class OrdinalTagFilter(OrdinalFilter):
 
 class _DateAttributeFilter(OrdinalFilter):
     def __init__(self, p_expression, p_match, p_getter):
-        super(_DateAttributeFilter, self).__init__(p_expression, p_match)
+        super().__init__(p_expression, p_match)
         self.getter = p_getter
 
     def match(self, p_todo):
@@ -268,7 +270,7 @@ _CREATED_MATCH = r'creat(ion|ed?):' + _OPERATOR_MATCH + _VALUE_MATCH
 
 class CreationFilter(_DateAttributeFilter):
     def __init__(self, p_expression):
-        super(CreationFilter, self).__init__(
+        super().__init__(
             p_expression,
             _CREATED_MATCH,
             lambda t: t.creation_date()  # pragma: no branch
@@ -280,7 +282,7 @@ _COMPLETED_MATCH = r'complet(ed?|ion):' + _OPERATOR_MATCH + _VALUE_MATCH
 
 class CompletionFilter(_DateAttributeFilter):
     def __init__(self, p_expression):
-        super(CompletionFilter, self).__init__(
+        super().__init__(
             p_expression,
             _COMPLETED_MATCH,
             lambda t: t.completion_date()  # pragma: no branch
@@ -292,7 +294,7 @@ _PRIORITY_MATCH = r"\(" + _OPERATOR_MATCH + r"(?P<value>[A-Z]{1})\)"
 
 class PriorityFilter(OrdinalFilter):
     def __init__(self, p_expression):
-        super(PriorityFilter, self).__init__(p_expression, _PRIORITY_MATCH)
+        super().__init__(p_expression, _PRIORITY_MATCH)
 
     def match(self, p_todo):
         """

topydo/lib/IcalPrinter.py

@@ -66,7 +66,7 @@ class IcalPrinter(Printer):
     """
 
     def __init__(self, p_todolist):
-        super(IcalPrinter, self).__init__()
+        super().__init__()
         self.todolist = p_todolist
 
         try:

topydo/lib/Importance.py

@@ -83,12 +83,14 @@ def average_importance(p_todo, p_ignore_weekend=config().ignore_weekends()):
     average = 0
     parents = []
 
-    if 'parents' in p_todo.attributes:
+    try:
         sum_importance = own_importance
-        parents = p_todo.attributes['parents']
+        parents = p_todo.parents()
         for parent in parents:
             sum_importance += importance(parent, p_ignore_weekend)
 
         average = float(sum_importance) / float(1 + len(parents))
+    except AttributeError:
+        pass
 
     return max(own_importance, average)

topydo/lib/JsonPrinter.py

@@ -52,7 +52,7 @@ class JsonPrinter(Printer):
     """
 
     def __init__(self):
-        super(JsonPrinter, self).__init__()
+        super().__init__()
 
     def print_todo(self, p_todo):
         return json.dumps(_convert_todo(p_todo), ensure_ascii=False,

topydo/lib/ListFormat.py

@@ -43,7 +43,7 @@ def humanize_date(p_datetime):
     """ Returns a relative date string from a datetime object. """
     now = arrow.now()
     date = now.replace(day=p_datetime.day, month=p_datetime.month, year=p_datetime.year)
-    return date.humanize()
+    return date.humanize().replace('just now', 'today')
 
 def humanize_dates(p_due=None, p_start=None, p_creation=None):
     """
@@ -183,6 +183,9 @@ class ListFormatParser(object):
             # priority (or placeholder space)
             'P': lambda t: t.priority() if t.priority() else ' ',
 
+            # raw text
+            'r': lambda t: t.source(),
+
             # text
             's': lambda t: t.text(),
 

topydo/lib/MultiCommand.py

@@ -27,7 +27,7 @@ class MultiCommand(ExpressionCommand):
                  p_out=lambda a: None,
                  p_err=lambda a: None,
                  p_prompt=lambda a: None):
-        super(MultiCommand, self).__init__(
+        super().__init__(
             p_args, p_todolist, p_out, p_err, p_prompt)
 
         self.todos = []
@@ -114,7 +114,7 @@ class MultiCommand(ExpressionCommand):
         raise NotImplementedError
 
     def execute(self):
-        if not super(MultiCommand, self).execute():
+        if not super().execute():
             return False
 
         self._process_flags()

topydo/lib/PrettyPrinter.py

@@ -50,7 +50,7 @@ class PrettyPrinter(Printer):
         """
         Constructor.
         """
-        super(PrettyPrinter, self).__init__()
+        super().__init__()
         self.filters = []
 
     def add_filter(self, p_filter):

topydo/lib/PrettyPrinterFilter.py

@@ -29,4 +29,3 @@ class PrettyPrinterFilter(object):
         Applies a filter to p_todo_str and returns a modified version of it.
         """
         raise NotImplementedError
-

topydo/lib/RelativeDate.py

@@ -37,9 +37,26 @@ def _add_months(p_sourcedate, p_months):
     return date(year, month, day)
 
 
+def _add_business_days(p_sourcedate, p_bdays):
+    """ Adds a number of business days to the source date. """
+    result = p_sourcedate
+    delta = 1 if p_bdays > 0 else -1
+
+    while abs(p_bdays) > 0:
+        result += timedelta(delta)
+
+        weekday = result.weekday()
+        if weekday >= 5:
+            continue
+
+        p_bdays = p_bdays - 1 if delta > 0 else p_bdays + 1
+
+    return result
+
+
 def _convert_pattern(p_length, p_periodunit, p_offset=None):
     """
-    Converts a pattern in the form [0-9][dwmy] and returns a date from the
+    Converts a pattern in the form [0-9][dwmyb] and returns a date from the
     offset with the period of time added to it.
     """
     result = None
@@ -55,6 +72,8 @@ def _convert_pattern(p_length, p_periodunit, p_offset=None):
         result = _add_months(p_offset, p_length)
     elif p_periodunit == 'y':
         result = _add_months(p_offset, p_length * 12)
+    elif p_periodunit == 'b':
+        result = _add_business_days(p_offset, p_length)
 
     return result
 
@@ -98,7 +117,8 @@ def relative_date_to_date(p_date, p_offset=None):
     p_date = p_date.lower()
     p_offset = p_offset or date.today()
 
-    relative = re.match('(?P<length>-?[0-9]+)(?P<period>[dwmy])$', p_date, re.I)
+    relative = re.match('(?P<length>-?[0-9]+)(?P<period>[dwmyb])$',
+                        p_date, re.I)
 
     monday = 'mo(n(day)?)?$'
     tuesday = 'tu(e(sday)?)?$'

topydo/lib/TodoBase.py

@@ -48,17 +48,14 @@ class TodoBase(object):
         Returns a tag value associated with p_key. Returns p_default if p_key
         does not exist (which defaults to None).
         """
-        values = self.tag_values(p_key)
-        return values[0] if len(values) else p_default
+        return self.tag_values(p_key)[0] if p_key in self.fields['tags'] else p_default
 
     def tag_values(self, p_key):
         """
         Returns a list of all tag values associated with p_key. Returns
         empty list if p_key does not exist.
         """
-        tags = self.fields['tags']
-        matches = [tag[1] for tag in tags if tag[0] == p_key]
-        return matches if len(matches) else []
+        return self.fields['tags'][p_key] if p_key in self.fields['tags'] else []
 
     def has_tag(self, p_key, p_value=""):
         """
@@ -66,14 +63,28 @@ class TodoBase(object):
         value is passed, it will only return true when there exists a tag with
         the given key-value combination.
         """
-        result = [t for t in self.tag_values(p_key)
-                  if p_value == "" or t == p_value]
-        return len(result) > 0
+        tags = self.fields['tags']
+        return p_key in tags and (p_value == "" or p_value in tags[p_key])
 
     def add_tag(self, p_key, p_value):
         """ Adds a tag to the todo. """
         self.set_tag(p_key, p_value, True)
 
+    def _remove_tag_helper(self, p_key, p_value):
+        """
+        Removes a tag from the internal todo dictionary. Only those instances
+        with the given value are removed. If the value is empty, all tags with
+        the given key are removed.
+        """
+        tags = self.fields['tags']
+
+        try:
+            tags[p_key] = [t for t in tags[p_key] if p_value != "" and t != p_value]
+            if len(tags[p_key]) == 0:
+                del tags[p_key]
+        except KeyError:
+            pass
+
     def set_tag(self, p_key, p_value="", p_force_add=False, p_old_value=""):
         """
         Sets a occurrence of the tag identified by p_key. Sets an arbitrary
@@ -92,12 +103,11 @@ class TodoBase(object):
             self.remove_tag(p_key, p_old_value)
             return
 
+        tags = self.fields['tags']
         value = p_old_value if p_old_value else self.tag_value(p_key)
 
         if not p_force_add and value:
-            # remove old value from the tags
-            self.fields['tags'] = [t for t in self.fields['tags']
-                                   if not (t[0] == p_key and t[1] == value)]
+            self._remove_tag_helper(p_key, value)
 
             self.src = re.sub(
                 r'\b' + p_key + ':' + value + r'\b',
@@ -107,7 +117,10 @@ class TodoBase(object):
         else:
             self.src += ' ' + p_key + ':' + p_value
 
-        self.fields['tags'].append((p_key, p_value))
+        try:
+            tags[p_key].append(p_value)
+        except KeyError:
+            tags[p_key] = [p_value]
 
     def remove_tag(self, p_key, p_value=""):
         """
@@ -116,12 +129,7 @@ class TodoBase(object):
         removed.
         Else, only those tags with the value will be removed.
         """
-
-        # Build a new list that excludes the specified tag, match by value when
-        # p_value is given.
-        self.fields['tags'] = [t for t in self.fields['tags']
-                               if not (t[0] == p_key and (p_value == "" or
-                                                          t[1] == p_value))]
+        self._remove_tag_helper(p_key, p_value)
 
         # when value == "", match any value having key p_key
         value = p_value if p_value != "" else r'\S+'
@@ -132,7 +140,8 @@ class TodoBase(object):
         Returns a list of tuples with key-value pairs representing tags in
         this todo item.
         """
-        return self.fields['tags']
+        tags = self.fields['tags']
+        return [(t, v) for t in tags for v in tags[t]]
 
     def set_priority(self, p_priority):
         """

topydo/lib/TodoList.py

@@ -18,11 +18,35 @@
 A list of todo items.
 """
 
+import types
+
 from topydo.lib.Config import config
-from topydo.lib.Graph import DirectedGraph
 from topydo.lib.TodoListBase import TodoListBase
 
 
+def _needs_dependencies(p_function):
+    """
+    A decorator that triggers the population of the dependency tree in a
+    TodoList (and other administration). The decorator should be applied to
+    methods of TodoList that require dependency information.
+    """
+    def build_dependency_information(p_todolist):
+        for todo in p_todolist._todos:
+            p_todolist._register_todo(todo)
+
+    def inner(self, *args, **kwargs):
+        if not self._initialized:
+            self._initialized = True
+
+            from topydo.lib.Graph import DirectedGraph
+            self._depgraph = DirectedGraph()
+
+            build_dependency_information(self)
+
+        return p_function(self, *args, **kwargs)
+
+    return inner
+
 class TodoList(TodoListBase):
     """
     Provides operations for a todo list, such as adding items, removing them,
@@ -37,21 +61,27 @@ class TodoList(TodoListBase):
         Should be given a list of strings, each element a single todo string.
         The string will be parsed.
         """
+        self._initialized = False  # whether dependency information was
+                                   # initialized
+
         # initialize these first because the constructor calls add_list
         self._tododict = {}  # hash(todo) to todo lookup
-        self._depgraph = DirectedGraph()
+        self._parentdict = {}  # dependency id => parent todo
+        self._depgraph = None
 
-        super(TodoList, self).__init__(p_todostrings)
+        super().__init__(p_todostrings)
 
+    @_needs_dependencies
     def todo_by_dep_id(self, p_dep_id):
         """
         Returns the todo that has the id tag set to the value p_dep_id.
-        There is only one such task, the behavior is undefined when a tag has
-        more than one id tag.
+        There is only one such task, the behavior is undefined when a todo item
+        has more than one id tag.
         """
-        hits = [t for t in self._todos if t.tag_value('id') == p_dep_id]
-
-        return hits[0] if len(hits) else None
+        try:
+            return self._parentdict[p_dep_id]
+        except KeyError:
+            return None
 
     def _maintain_dep_graph(self, p_todo):
         """
@@ -61,6 +91,7 @@ class TodoList(TodoListBase):
         dep_id = p_todo.tag_value('id')
         # maintain dependency graph
         if dep_id:
+            self._parentdict[dep_id] = p_todo
             self._depgraph.add_node(hash(p_todo))
 
             # connect all tasks we have in memory so far that refer to this
@@ -70,29 +101,39 @@ class TodoList(TodoListBase):
 
                 self._depgraph.add_edge(hash(p_todo), hash(dep), dep_id)
 
-        for child in p_todo.tag_values('p'):
-            parent = self.todo_by_dep_id(child)
-            if parent:
-                self._depgraph.add_edge(hash(parent), hash(p_todo), child)
+        for dep_id in p_todo.tag_values('p'):
+            try:
+                parent = self._parentdict[dep_id]
+                self._depgraph.add_edge(hash(parent), hash(p_todo), dep_id)
+            except KeyError:
+                pass
+
+    def _register_todo(self, p_todo):
+        self._maintain_dep_graph(p_todo)
+        self._tododict[hash(p_todo)] = p_todo
 
     def add_todos(self, p_todos):
-        for todo in p_todos:
-            self._todos.append(todo)
-            self._tododict[hash(todo)] = todo
-            self._maintain_dep_graph(todo)
+        super().add_todos(p_todos)
 
-        self._update_todo_ids()
-        self._update_parent_cache()
-        self.dirty = True
+        for todo in self._todos:
+            todo.parents = types.MethodType(lambda i: self.parents(i), todo)
+
+            # only do administration when the dependency info is initialized,
+            # otherwise we postpone it until it's really needed (through the
+            # _needs_dependencies decorator)
+            if self._initialized:
+                self._register_todo(todo)
 
     def delete(self, p_todo):
         """ Deletes a todo item from the list. """
         try:
             number = self._todos.index(p_todo)
 
+            if p_todo.has_tag('id'):
                 for child in self.children(p_todo):
                     self.remove_dependency(p_todo, child)
 
+            if p_todo.has_tag('p'):
                 for parent in self.parents(p_todo):
                     self.remove_dependency(parent, p_todo)
 
@@ -104,6 +145,7 @@ class TodoList(TodoListBase):
             # todo item couldn't be found, ignore
             pass
 
+    @_needs_dependencies
     def add_dependency(self, p_from_todo, p_to_todo):
         """ Adds a dependency from task 1 to task 2. """
         def find_next_id():
@@ -117,7 +159,8 @@ class TodoList(TodoListBase):
                 Returns True if there exists a todo with the given parent ID.
                 """
                 for todo in self._todos:
-                    if todo.has_tag('id', str(p_id)):
+                    number = str(p_id)
+                    if todo.has_tag('id', number) or todo.has_tag('p', number):
                         return True
 
                 return False
@@ -158,11 +201,11 @@ class TodoList(TodoListBase):
 
             p_to_todo.add_tag('p', dep_id)
             self._depgraph.add_edge(hash(p_from_todo), hash(p_to_todo), dep_id)
-            self._update_parent_cache()
             append_projects_to_subtodo()
             append_contexts_to_subtodo()
             self.dirty = True
 
+    @_needs_dependencies
     def remove_dependency(self, p_from_todo, p_to_todo):
         """ Removes a dependency between two todos. """
         dep_id = p_from_todo.tag_value('id')
@@ -170,13 +213,14 @@ class TodoList(TodoListBase):
         if dep_id:
             p_to_todo.remove_tag('p', dep_id)
             self._depgraph.remove_edge(hash(p_from_todo), hash(p_to_todo))
-            self._update_parent_cache()
 
             if not self.children(p_from_todo, True):
                 p_from_todo.remove_tag('id')
+                del self._parentdict[dep_id]
 
             self.dirty = True
 
+    @_needs_dependencies
     def parents(self, p_todo, p_only_direct=False):
         """
         Returns a list of parent todos that (in)directly depend on the
@@ -186,6 +230,7 @@ class TodoList(TodoListBase):
             hash(p_todo), not p_only_direct)
         return [self._tododict[parent] for parent in parents]
 
+    @_needs_dependencies
     def children(self, p_todo, p_only_direct=False):
         """
         Returns a list of child todos that the given todo (in)directly depends
@@ -195,6 +240,7 @@ class TodoList(TodoListBase):
             self._depgraph.outgoing_neighbors(hash(p_todo), not p_only_direct)
         return [self._tododict[child] for child in children]
 
+    @_needs_dependencies
     def clean_dependencies(self):
         """
         Cleans the dependency graph.
@@ -219,6 +265,7 @@ class TodoList(TodoListBase):
                 value = todo.tag_value('id')
                 if not self._depgraph.has_edge_id(value):
                     remove_tag(todo, 'id', value)
+                    del self._parentdict[value]
 
         def clean_orphan_relations():
             """
@@ -237,12 +284,3 @@ class TodoList(TodoListBase):
         clean_parent_relations()
         clean_orphan_relations()
 
-    def _update_parent_cache(self):
-        """
-        Sets the attribute to the list of parents, such that others may access
-        it outside this todo list.
-        This is used for calculating the average importance, that requires
-        access to a todo's parents.
-        """
-        for todo in self._todos:
-            todo.attributes['parents'] = self.parents(todo)

topydo/lib/TodoListBase.py

@@ -54,6 +54,12 @@ class TodoListBase(object):
         self.add_list(p_todostrings)
         self._dirty = False
 
+    def __iter__(self):
+        """
+        Allows use of `for my_todo in todolist` constructs.
+        """
+        return iter(self._todos)
+
     def todo(self, p_identifier):
         """
         The _todos list has the same order as in the backend store (usually
@@ -95,11 +101,11 @@ class TodoListBase(object):
                         # the expression is a string and no leading zeroes,
                         # treat it as an integer
                         raise TypeError
-                except TypeError:
+                except TypeError as te:
                     try:
                         result = self._todos[int(p_identifier) - 1]
-                    except IndexError:
-                        raise InvalidTodoException
+                    except (ValueError, IndexError):
+                        raise InvalidTodoException from te
 
             return result
 
@@ -251,8 +257,8 @@ class TodoListBase(object):
                 return self._todo_id_map[p_todo]
             else:
                 return self._todos.index(p_todo) + 1
-        except (ValueError, KeyError):
-            raise InvalidTodoException
+        except (ValueError, KeyError) as ex:
+            raise InvalidTodoException from ex
 
     def _update_todo_ids(self):
         # the idea is to have a hash that is independent of the position of the

topydo/lib/TodoParser.py

@@ -33,7 +33,7 @@ _NORMAL_HEAD_MATCH = re.compile(
     r'(\((?P<priority>[A-Z])\) )?' + '((?P<creationDate>' + _DATE_MATCH +
     ') )?(?P<rest>.*)')
 
-_TAG_MATCH = re.compile('(?P<key>[^:]+):(?P<value>.+)')
+_TAG_MATCH = re.compile('(?P<tag>[^:]+):(?P<value>.+)')
 _PROJECT_MATCH = re.compile(r'\+(\S*\w)')
 _CONTEXT_MATCH = re.compile(r'@(\S*\w)')
 
@@ -57,7 +57,7 @@ def parse_line(p_string):
         'text': "",
         'projects': [],
         'contexts': [],
-        'tags': []
+        'tags': {},
     }
 
     completed_head = _COMPLETED_HEAD_MATCH.match(p_string)
@@ -94,9 +94,13 @@ def parse_line(p_string):
 
         tag = _TAG_MATCH.match(word)
         if tag:
-            result['tags'].append((tag.group('key'), tag.group('value')))
-            continue
-
+            tag_name = tag.group('tag')
+            tag_value = tag.group('value')
+            try:
+                result['tags'][tag_name].append(tag_value)
+            except KeyError:
+                result['tags'][tag_name] = [tag_value]
+        else:
             result['text'] += word + ' '
 
     # strip trailing space from resulting text

topydo/lib/Utils.py

@@ -87,7 +87,7 @@ def get_terminal_size(p_getter=None):
                     occurs during running the unittest on Windows (but not on Linux?)
                     """
                     terminal_size = namedtuple('Terminal_Size', 'columns lines')
-                    sz = terminal_size((80, 24))
+                    sz = terminal_size(80, 24)
 
                 return sz
 

topydo/lib/prettyprinters/Format.py

@@ -25,7 +25,7 @@ from topydo.lib.ListFormat import ListFormatParser
 
 class PrettyPrinterFormatFilter(PrettyPrinterFilter):
     def __init__(self, p_todolist, p_format=None):
-        super(PrettyPrinterFormatFilter, self).__init__()
+        super().__init__()
         self.parser = ListFormatParser(p_todolist, p_format)
 
     def filter(self, p_todo_str, p_todo):

topydo/lib/prettyprinters/Numbers.py

@@ -23,7 +23,7 @@ class PrettyPrinterNumbers(PrettyPrinterFilter):
     """ Prepends the todo's number, retrieved from the todolist. """
 
     def __init__(self, p_todolist):
-        super(PrettyPrinterNumbers, self).__init__()
+        super().__init__()
         self.todolist = p_todolist
 
     def filter(self, p_todo_str, p_todo):

topydo/ui/Main.py

@@ -28,7 +28,7 @@ from topydo.ui.KeystateWidget import KeystateWidget
 from topydo.ui.TodoListWidget import TodoListWidget
 from topydo.ui.ViewWidget import ViewWidget
 from topydo.ui.ColumnLayout import columns
-from topydo.lib.Config import config
+from topydo.lib.Config import config, ConfigError
 from topydo.lib.Sorter import Sorter
 from topydo.lib.Filter import get_filter_list, RelevanceFilter, DependencyFilter
 from topydo.lib.Utils import get_terminal_size
@@ -171,7 +171,12 @@ class UIApplication(CLIApplicationBase):
         """
         p_output = p_output or self._output
         p_command = shlex.split(p_command)
+        try:
             (subcommand, args) = get_subcommand(p_command)
+        except ConfigError as cerr:
+            self._print_to_console(
+                'Error: {}. Check your aliases configuration.'.format(cerr))
+            return
 
         self._backup(subcommand, args)