pylint: upgrade to 1.4.1

third_party/logilab/astroid/modutils.py

 # copyright 2003-2014 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
 #
 # This file is part of astroid.
 #
 # astroid is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Lesser General Public License as published by the Free
 # Software Foundation, either version 2.1 of the License, or (at your option) any
 # later version.
 #
 # astroid is distributed in the hope that it will be useful, but WITHOUT
 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 # FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
 # details.
 #
 # You should have received a copy of the GNU Lesser General Public License along
 # with astroid.  If not, see <http://www.gnu.org/licenses/>.
 """Python modules manipulation utility functions.
 
 :type PY_SOURCE_EXTS: tuple(str)
 :var PY_SOURCE_EXTS: list of possible python source file extension
 
-:type STD_LIB_DIRS: list of str
+:type STD_LIB_DIRS: set of str
 :var STD_LIB_DIRS: directories where standard modules are located
 
 :type BUILTIN_MODULES: dict
 :var BUILTIN_MODULES: dictionary with builtin module names has key
 """
 from __future__ import with_statement
 
 __docformat__ = "restructuredtext en"
 
 import imp
@@ skipping 13 matching lines @@
 PY_ZIPMODULE = object()
 
 if sys.platform.startswith('win'):
     PY_SOURCE_EXTS = ('py', 'pyw')
     PY_COMPILED_EXTS = ('dll', 'pyd')
 else:
     PY_SOURCE_EXTS = ('py',)
     PY_COMPILED_EXTS = ('so',)
 
 # Notes about STD_LIB_DIRS
-# Consider arch-specific installation for STD_LIB_DIR definition
+# Consider arch-specific installation for STD_LIB_DIRS definition
 # :mod:`distutils.sysconfig` contains to much hardcoded values to rely on
 #
 # :see: `Problems with /usr/lib64 builds <http://bugs.python.org/issue1294959>`_
 # :see: `FHS <http://www.pathname.com/fhs/pub/fhs-2.3.html#LIBLTQUALGTALTERNATEFORMATESSENTIAL>`_
 try:
-    # The explicit prefix is to work around a patch in virtualenv that
+    # The explicit sys.prefix is to work around a patch in virtualenv that
     # replaces the 'real' sys.prefix (i.e. the location of the binary)
     # with the prefix from which the virtualenv was created. This throws
     # off the detection logic for standard library modules, thus the
     # workaround.
-    STD_LIB_DIRS = [
+    STD_LIB_DIRS = {
         get_python_lib(standard_lib=True, prefix=sys.prefix),
-        get_python_lib(standard_lib=True)]
+        # Take care of installations where exec_prefix != prefix.
+        get_python_lib(standard_lib=True, prefix=sys.exec_prefix),
+        get_python_lib(standard_lib=True)}
     if os.name == 'nt':
-        STD_LIB_DIRS.append(os.path.join(sys.prefix, 'dlls'))
+        STD_LIB_DIRS.add(os.path.join(sys.prefix, 'dlls'))
         try:
             # real_prefix is defined when running inside virtualenv.
-            STD_LIB_DIRS.append(os.path.join(sys.real_prefix, 'dlls'))
+            STD_LIB_DIRS.add(os.path.join(sys.real_prefix, 'dlls'))
         except AttributeError:
             pass
 # get_python_lib(standard_lib=1) is not available on pypy, set STD_LIB_DIR to
 # non-valid path, see https://bugs.pypy.org/issue1164
 except DistutilsPlatformError:
-    STD_LIB_DIRS = []
+    STD_LIB_DIRS = set()
 
 EXT_LIB_DIR = get_python_lib()
 
 BUILTIN_MODULES = dict(zip(sys.builtin_module_names,
                            [1]*len(sys.builtin_module_names)))
 
 
 class NoSourceFile(Exception):
     """exception raised when we are not able to get a python
     source file for a precompiled file
@@ skipping 567 matching lines @@
 
 def _has_init(directory):
     """if the given directory has a valid __init__ file, return its path,
     else return None
     """
     mod_or_pack = os.path.join(directory, '__init__')
     for ext in PY_SOURCE_EXTS + ('pyc', 'pyo'):
         if os.path.exists(mod_or_pack + '.' + ext):
             return mod_or_pack + '.' + ext
     return None