def checkDeadScopes(self):
"""
Look at scopes which have been fully examined and report names in them
which were imported but unused.
"""
for scope in self.deadScopes:
if isinstance(scope.get('__all__'), ExportBinding):
all_names = set(scope['__all__'].names)
if not scope.importStarred and \
os.path.basename(self.filename) != '__init__.py':
# Look for possible mistakes in the export list
undefined = all_names.difference(scope)
for name in undefined:
self.report(messages.UndefinedExport,
scope['__all__'].source, name)
else:
all_names = []
# Look for imported names that aren't used.
for value in scope.values():
if isinstance(value, Importation):
used = value.used or value.name in all_names
if not used:
messg = messages.UnusedImport
self.report(messg, value.source, value.name)
for node in value.redefined:
if isinstance(self.getParent(node), ast.For):
messg = messages.ImportShadowedByLoopVar
elif used:
continue
else:
messg = messages.RedefinedWhileUnused
self.report(messg, node, value.name, value.source)
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