Make `no-self-use` checker not throw a warning if method has a `super()` call.

This is only enabled for python 3.0+ and only for `super` calls with no
arguments.

Fixes issue #667.

4 files changed, 25 insertions, 1 deletions

diff --git a/pylint/checkers/classes.py b/pylint/checkers/classes.py
index 0fc0fae..c628e94 100644
--- a/pylint/checkers/classes.py
+++ b/pylint/checkers/classes.py
@@ -140,6 +140,14 @@ def _is_attribute_property(name, klass):
             return True
     return False
 
+def _has_super_call(fundef_node):
+    for call in fundef_node.nodes_of_class(astroid.Call):
+        func = call.func
+        if (isinstance(func, astroid.Name) and
+                func.name == 'super' and
+                not call.args):
+            return True
+    return False
 
 MSGS = {
     'F0202': ('Unable to check methods signature (%s / %s)',
@@ -545,7 +553,8 @@ a metaclass class method.'}
                     and not node.name in PYMETHODS
                     and not (node.is_abstract() or
                              overrides_a_method(class_node, node.name) or
-                             decorated_with_property(node))):
+                             decorated_with_property(node) or
+                             (six.PY3 and _has_super_call(node)))):
                 self.add_message('no-self-use', node=node)
 
     def visit_attribute(self, node):
diff --git a/pylint/test/functional/no_self_use_py3.py b/pylint/test/functional/no_self_use_py3.py
new file mode 100644
index 0000000..f401508
--- /dev/null
+++ b/pylint/test/functional/no_self_use_py3.py
@@ -0,0 +1,12 @@
+# pylint: disable=missing-docstring,no-init,unused-argument,invalid-name,too-few-public-methods
+
+class A:
+    def __init__(self):
+        self.store = {}
+
+    def get(self, key, default=None):
+        return self.store.get(key, default)
+
+class B(A):
+    def get_memo(self, obj):
+        return super().get(obj)
diff --git a/pylint/test/functional/no_self_use_py3.rc b/pylint/test/functional/no_self_use_py3.rc
new file mode 100644
index 0000000..a2ab06c
--- /dev/null
+++ b/pylint/test/functional/no_self_use_py3.rc
@@ -0,0 +1,2 @@
+[testoptions]
+min_pyver=3.0
\ No newline at end of file
diff --git a/pylint/test/functional/no_self_use_py3.txt b/pylint/test/functional/no_self_use_py3.txt
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/pylint/test/functional/no_self_use_py3.txt
@@ -0,0 +1 @@
+