Fix instances of unneeded-not in pylint's codebase.

4 files changed, 4 insertions, 4 deletions

diff --git a/pylint/checkers/classes.py b/pylint/checkers/classes.py
index 6763f74..e79cf97 100644
--- a/pylint/checkers/classes.py
+++ b/pylint/checkers/classes.py
@@ -570,7 +570,7 @@ a metaclass class method.'}
                 return
             class_node = node.parent.frame()
             if (self._meth_could_be_func and node.type == 'method'
-                    and not node.name in PYMETHODS
+                    and node.name not in PYMETHODS
                     and not (node.is_abstract() or
                              overrides_a_method(class_node, node.name) or
                              decorated_with_property(node) or
diff --git a/pylint/checkers/imports.py b/pylint/checkers/imports.py
index 0be2b2c..59c6ed0 100644
--- a/pylint/checkers/imports.py
+++ b/pylint/checkers/imports.py
@@ -372,7 +372,7 @@ given file (report RP0402 must not be disabled)'}
             # handle dependencies
             importedmodnames = self.stats['dependencies'].setdefault(
                 importedmodname, set())
-            if not context_name in importedmodnames:
+            if context_name not in importedmodnames:
                 importedmodnames.add(context_name)
             # update import graph
             mgraph = self.import_graph[context_name]
diff --git a/pylint/checkers/utils.py b/pylint/checkers/utils.py
index b85c237..cfb20d7 100644
--- a/pylint/checkers/utils.py
+++ b/pylint/checkers/utils.py
@@ -382,7 +382,7 @@ def is_attr_protected(attrname):
     """return True if attribute name is protected (start with _ and some other
     details), False otherwise.
     """
-    return attrname[0] == '_' and not attrname == '_' and not (
+    return attrname[0] == '_' and attrname != '_' and not (
         attrname.startswith('__') and attrname.endswith('__'))
 
 def node_frame_class(node):
diff --git a/pylint/checkers/variables.py b/pylint/checkers/variables.py
index f0f0fa0..cde66eb 100644
--- a/pylint/checkers/variables.py
+++ b/pylint/checkers/variables.py
@@ -729,7 +729,7 @@ builtins. Remember that you should avoid to define new builtins when possible.'
             assign = astmts[0].assign_type()
             if (isinstance(assign, (astroid.For, astroid.Comprehension,
                                     astroid.GeneratorExp))
-                    and not assign.statement() is node.statement()):
+                    and assign.statement() is not node.statement()):
                 self.add_message('undefined-loop-variable', args=name, node=node)
 
     @check_messages('redefine-in-handler')