removed lots of unused imports, delayed some imports that are only needed for...

removed lots of unused imports, delayed some imports that are only needed for Cython specific syntax

--HG--
extra : rebase_source : a2df3675fd1efae1a1122ca9742e99ab1405fba6

Cython/Compiler/AutoDocTransforms.py

 from Cython.Compiler.Visitor import CythonTransform
-from Cython.Compiler.Nodes import DefNode, CFuncDefNode
-from Cython.Compiler.Errors import CompileError
 from Cython.Compiler.StringEncoding import EncodedString
 from Cython.Compiler import Options
 from Cython.Compiler import PyrexTypes, ExprNodes

Cython/Compiler/Buffer.py

-from Visitor import VisitorTransform, CythonTransform
+from Visitor import CythonTransform
 from ModuleNode import ModuleNode
-from Nodes import *
 from ExprNodes import *
-from StringEncoding import EncodedString
 from Errors import CompileError
 from UtilityCode import CythonUtilityCode
-from Code import UtilityCode, ContentHashingUtilityCode
-import Cython.Compiler.Options
+from Code import UtilityCode
 import Interpreter
 import PyrexTypes
 import Naming
 import Symtab
 
-import textwrap
 
 def dedent(text, reindent=0):
-    text = textwrap.dedent(text)
+    from textwrap import dedent
+    text = dedent(text)
     if reindent > 0:
         indent = " " * reindent
         text = '\n'.join([indent + x for x in text.split('\n')])

Cython/Compiler/CodeGeneration.py

-from Cython.Compiler.Visitor import VisitorTransform, CythonTransform
-from Cython.Compiler.ModuleNode import ModuleNode
-from Cython.Compiler.Nodes import *
-from Cython.Compiler.ExprNodes import *
+from Cython.Compiler.Visitor import VisitorTransform
+from Cython.Compiler.Nodes import StatListNode
 
 class ExtractPxdCode(VisitorTransform):
     """

Cython/Compiler/CythonScope.py

@@ -3,8 +3,6 @@ from PyrexTypes import *
 from UtilityCode import CythonUtilityCode
 from Errors import error
 from Scanning import StringSourceDescriptor
-import Options
-import Buffer
 import MemoryView
 
 class CythonScope(ModuleScope):

Cython/Compiler/FlowControl.py

@@ -8,10 +8,10 @@ cython.declare(PyrexTypes=object, Naming=object, ExprNodes=object, Nodes=object,
 import Builtin
 import ExprNodes
 import Nodes
-from PyrexTypes import py_object_type, unspecified_type
+from PyrexTypes import py_object_type
 
 from Visitor import TreeVisitor, CythonTransform
-from Errors import error, warning, CompileError, InternalError
+from Errors import error, warning, InternalError
 
 class TypedExprNode(ExprNodes.ExprNode):
     # Used for declaring assignments of a specified type without a known entry.

Cython/Compiler/Interpreter.py

@@ -6,7 +6,6 @@ For now this only covers parse tree to value conversion of
 compile-time values.
 """
 
-import sys
 from Nodes import *
 from ExprNodes import *
 from Errors import CompileError

Cython/Compiler/Main.py

@@ -7,9 +7,6 @@ if sys.version_info[:2] < (2, 3):
     sys.stderr.write("Sorry, Cython requires Python 2.3 or later\n")
     sys.exit(1)
 
-import itertools
-
-import Code
 import Errors
 # Do not import Parsing here, import it when needed, because Parsing imports
 # Nodes, which globally needs debug command line options initialized to set a
@@ -18,11 +15,9 @@ import Errors
 # import Parsing
 import Version
 from Scanning import PyrexScanner, FileSourceDescriptor
-from Errors import PyrexError, CompileError, InternalError, AbortError, error, warning
+from Errors import PyrexError, CompileError, error, warning
 from Symtab import ModuleScope
 from Cython import Utils
-from Cython.Utils import open_new_file, replace_suffix
-import DebugFlags
 import Options
 
 module_name_pattern = re.compile(r"[A-Za-z_][A-Za-z0-9_]*(\.[A-Za-z_][A-Za-z0-9_]*)*$")

Cython/Compiler/MemoryView.py

 from Errors import CompileError, error
 import ExprNodes
-from ExprNodes import IntNode, NoneNode, IntBinopNode, NameNode, AttributeNode
-from Visitor import CythonTransform
+from ExprNodes import IntNode, NameNode, AttributeNode
 import Options
 from Code import UtilityCode
 from UtilityCode import CythonUtilityCode
-from PyrexTypes import py_object_type, cython_memoryview_ptr_type
 import Buffer
 import PyrexTypes
 

Cython/Compiler/ModuleNode.py

@@ -16,10 +16,8 @@ import Code
 import Naming
 import Nodes
 import Options
-import PyrexTypes
 import TypeSlots
 import Version
-import DebugFlags
 import PyrexTypes
 
 from Errors import error, warning

Cython/Compiler/Nodes.py

@@ -5,12 +5,12 @@
 import cython
 cython.declare(sys=object, os=object, time=object, copy=object,
                Builtin=object, error=object, warning=object, Naming=object, PyrexTypes=object,
-               py_object_type=object, ModuleScope=object, LocalScope=object, ClosureScope=object, \
+               py_object_type=object, ModuleScope=object, LocalScope=object, ClosureScope=object,
                StructOrUnionScope=object, PyClassScope=object, CClassScope=object,
                CppClassScope=object, UtilityCode=object, EncodedString=object,
                absolute_path_length=cython.Py_ssize_t)
 
-import sys, os, time, copy, textwrap
+import sys, os, time, copy
 
 import Builtin
 from Errors import error, warning, InternalError, CompileError

Cython/Compiler/ParseTreeTransforms.py

 import cython
 cython.declare(PyrexTypes=object, Naming=object, ExprNodes=object, Nodes=object,
-               Options=object, UtilNodes=object, ModuleNode=object,
-               LetNode=object, LetRefNode=object, TreeFragment=object,
-               TemplateTransform=object, EncodedString=object,
+               Options=object, UtilNodes=object, LetNode=object,
+               LetRefNode=object, TreeFragment=object, EncodedString=object,
                error=object, warning=object, copy=object)
 
 import PyrexTypes
@@ -14,9 +13,8 @@ import Builtin
 
 from Cython.Compiler.Visitor import VisitorTransform, TreeVisitor
 from Cython.Compiler.Visitor import CythonTransform, EnvTransform, ScopeTrackingTransform
-from Cython.Compiler.ModuleNode import ModuleNode
 from Cython.Compiler.UtilNodes import LetNode, LetRefNode, ResultRefNode
-from Cython.Compiler.TreeFragment import TreeFragment, TemplateTransform
+from Cython.Compiler.TreeFragment import TreeFragment
 from Cython.Compiler.StringEncoding import EncodedString
 from Cython.Compiler.Errors import error, warning, CompileError, InternalError
 

Cython/Compiler/Parsing.py

@@ -7,9 +7,7 @@
 import cython
 cython.declare(Nodes=object, ExprNodes=object, EncodedString=object)
 
-import os
 import re
-import sys
 
 from Cython.Compiler.Scanning import PyrexScanner, FileSourceDescriptor
 import Nodes
@@ -17,7 +15,7 @@ import ExprNodes
 import StringEncoding
 from StringEncoding import EncodedString, BytesLiteral, _unicode, _bytes
 from ModuleNode import ModuleNode
-from Errors import error, warning, InternalError
+from Errors import error, warning
 from Cython import Utils
 import Future
 import Options

Cython/Compiler/Pipeline.py

@@ -5,7 +5,7 @@ import Errors
 import DebugFlags
 import Options
 from Visitor import CythonTransform
-from Errors import PyrexError, CompileError, InternalError, AbortError, error
+from Errors import CompileError, InternalError, AbortError
 
 #
 # Really small pipeline stages

Cython/Compiler/PyrexTypes.py

@@ -2,8 +2,6 @@
 #   Cython/Python language types
 #
 
-import cython
-
 from Code import UtilityCode, LazyUtilityCode, ContentHashingUtilityCode
 import StringEncoding
 import Naming

Cython/Compiler/Scanning.py

@@ -3,7 +3,6 @@
 #   Cython Scanner
 #
 
-import sys
 import os
 import platform
 
@@ -11,10 +10,10 @@ import cython
 cython.declare(EncodedString=object, string_prefixes=object, raw_prefixes=object, IDENT=unicode,
                print_function=object)
 
-from Cython import Plex, Utils
+from Cython import Utils
 from Cython.Plex.Scanners import Scanner
 from Cython.Plex.Errors import UnrecognizedInput
-from Errors import CompileError, error
+from Errors import error
 from Lexicon import string_prefixes, raw_prefixes, make_lexicon, IDENT
 from Future import print_function
 

Cython/Compiler/Symtab.py

@@ -3,13 +3,11 @@
 #
 
 import re
-from Cython import Utils
 from Errors import warning, error, InternalError
 from StringEncoding import EncodedString
 import Options, Naming
 import PyrexTypes
 from PyrexTypes import py_object_type, unspecified_type
-import TypeSlots
 from TypeSlots import \
     pyfunction_signature, pymethod_signature, \
     get_special_method_signature, get_property_accessor_signature

Cython/Compiler/TreeFragment.py

@@ -6,7 +6,6 @@ import re
 from StringIO import StringIO
 from Scanning import PyrexScanner, StringSourceDescriptor
 from Symtab import ModuleScope
-import Symtab
 import PyrexTypes
 from Visitor import VisitorTransform
 from Nodes import Node, StatListNode

Cython/Compiler/TypeInference.py

-from Errors import error, warning, message, warn_once, InternalError
+from Errors import error, message
 import ExprNodes
 import Nodes
 import Builtin

Cython/Compiler/TypeSlots.py

@@ -6,7 +6,6 @@
 import Naming
 import PyrexTypes
 import StringEncoding
-import sys
 
 invisible = ['__cinit__', '__dealloc__', '__richcmp__',
              '__nonzero__', '__bool__']

Cython/Compiler/UtilityCode.py

 from TreeFragment import parse_from_strings, StringParseContext
-from Scanning import StringSourceDescriptor
 import Symtab
 import Naming
-from Cython.Compiler import Visitor
 import Code
 
 class NonManglingModuleScope(Symtab.ModuleScope):