Avoid unnecessary class attributes.

rebootstrap_section, relative_python and prefix are only used in __init__
method and there is no need to clutter object.

slapos/rebootstrap/__init__.py

@@ -26,14 +26,14 @@ class Rebootstrap:
     self.logger = logging.getLogger(__name__)
     self.buildout = buildout
     # fetch section of rebootstrap, obligatory
-    self.rebootstrap_section = buildout['rebootstrap']
+    rebootstrap_section = buildout['rebootstrap']
     # leave garbage? only in case of developer mode
-    self.developer_mode = self.rebootstrap_section.get('developer-mode',
+    self.developer_mode = rebootstrap_section.get('developer-mode',
       'false') == 'true'
     # fetch section to build python, obligatory
-    self.python_section = self.rebootstrap_section['section'].strip()
+    self.python_section = rebootstrap_section['section'].strip()
     # fetch version of python build, obligatory
-    self.version = self.rebootstrap_section['version'].strip()
+    version = rebootstrap_section['version'].strip()
 
     # usualy python will be try to found by convention in:
     # prefixed-parts/part-name/bin/part-name
@@ -41,21 +41,21 @@ class Rebootstrap:
     # find it as
     # prefixed-parts/part-name/python-path
     # where python-path is relative path to python interpreter
-    self.relative_python = self.rebootstrap_section.get('python-path', ''
+    relative_python = rebootstrap_section.get('python-path', ''
       ).strip() or os.path.join('bin', self.python_section)
     # query for currently running python
     self.running_python = sys.executable
 
     # generate rebootstrap.realname.version
-    self.prefix = 'rebootstrap.' + self.version + '.'
-    self.installed = '.' + self.prefix + 'installed.cfg'
+    prefix = 'rebootstrap.' + version + '.'
+    self.installed = '.' + prefix + 'installed.cfg'
     self.parts_directory = os.path.join(self.buildout['buildout'][
-      'directory'], self.prefix + 'parts')
+      'directory'], prefix + 'parts')
 
     # query for wanted python, which is combination of suffixed parts
     # and working recipe
     self.wanted_python = os.path.join(self.parts_directory,
-      self.python_section, self.relative_python)
+      self.python_section, relative_python)
 
   def __call__(self):
     self.install_section()