Revert "Revert "pylint: upgrade to 1.3.1""

third_party/logilab/astng/mixins.py

-# This program 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 of the License, or (at your option) any later
-# version.
-#
-# This program 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
-# this program; if not, write to the Free Software Foundation, Inc.,
-# 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
-# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
-# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
-# copyright 2003-2010 Sylvain Thenault, all rights reserved.
-# contact mailto:thenault@gmail.com
-#
-# This file is part of logilab-astng.
-#
-# logilab-astng 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.
-#
-# logilab-astng 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 logilab-astng. If not, see <http://www.gnu.org/licenses/>.
-"""This module contains some mixins for the different nodes.
-"""
-
-from logilab.astng.exceptions import (ASTNGBuildingException, InferenceError,
-                                      NotFoundError)
-
-
-class BlockRangeMixIn(object):
-    """override block range """
-    def set_line_info(self, lastchild):
-        self.fromlineno = self.lineno
-        self.tolineno = lastchild.tolineno
-        self.blockstart_tolineno = self._blockstart_toline()
-
-    def _elsed_block_range(self, lineno, orelse, last=None):
-        """handle block line numbers range for try/finally, for, if and while
-        statements
-        """
-        if lineno == self.fromlineno:
-            return lineno, lineno
-        if orelse:
-            if lineno >= orelse[0].fromlineno:
-                return lineno, orelse[-1].tolineno
-            return lineno, orelse[0].fromlineno - 1
-        return lineno, last or self.tolineno
-
-class FilterStmtsMixin(object):
-    """Mixin for statement filtering and assignment type"""
-
-    def _get_filtered_stmts(self, _, node, _stmts, mystmt):
-        """method used in _filter_stmts to get statemtents and trigger break"""
-        if self.statement() is mystmt:
-            # original node's statement is the assignment, only keep
-            # current node (gen exp, list comp)
-            return [node], True
-        return _stmts, False
-
-    def ass_type(self):
-        return self
-
-
-class AssignTypeMixin(object):
-
-    def ass_type(self):
-        return self
-
-    def _get_filtered_stmts(self, lookup_node, node, _stmts, mystmt):
-        """method used in filter_stmts"""
-        if self is mystmt:
-            return _stmts, True
-        if self.statement() is mystmt:
-            # original node's statement is the assignment, only keep
-            # current node (gen exp, list comp)
-            return [node], True
-        return _stmts, False
-
-
-class ParentAssignTypeMixin(AssignTypeMixin):
-
-    def ass_type(self):
-        return self.parent.ass_type()
-
-
-
-class FromImportMixIn(FilterStmtsMixin):
-    """MixIn for From and Import Nodes"""
-
-    def _infer_name(self, frame, name):
-        return name
-
-    def do_import_module(self, modname):
-        """return the ast for a module whose name is <modname> imported by <self>
-        """
-        # handle special case where we are on a package node importing a module
-        # using the same name as the package, which may end in an infinite loop
-        # on relative imports
-        # XXX: no more needed ?
-        mymodule = self.root()
-        level = getattr(self, 'level', None) # Import as no level
-        # XXX we should investigate deeper if we really want to check
-        # importing itself: modname and mymodule.name be relative or absolute
-        if mymodule.relative_to_absolute_name(modname, level) == mymodule.name:
-            # FIXME: we used to raise InferenceError here, but why ?
-            return mymodule
-        try:
-            return mymodule.import_module(modname, level=level)
-        except ASTNGBuildingException:
-            raise InferenceError(modname)
-        except SyntaxError, ex:
-            raise InferenceError(str(ex))
-
-    def real_name(self, asname):
-        """get name from 'as' name"""
-        for name, _asname in self.names:
-            if name == '*':
-                return asname
-            if not _asname:
-                name = name.split('.', 1)[0]
-                _asname = name
-            if asname == _asname:
-                return name
-        raise NotFoundError(asname)
-
-
-