Fixed some pep/pylint violations.

common/lib/capa/capa/responsetypes.py

@@ -915,16 +915,14 @@ class NumericalResponse(LoncapaResponse):
         else:
             return CorrectMap(self.answer_id, 'incorrect')
 
-    # TODO: add check_hint_condition(self, hxml_set, student_answers)
-
-    def compare_answer(self, a, b):
+    def compare_answer(self, ans1, ans2):
         """
         Outside-facing function that lets us compare two numerical answers,
         with this problem's tolerance.
         """
         return compare_with_tolerance(
-            evaluator({}, {}, a),
-            evaluator({}, {}, b),
+            evaluator({}, {}, ans1),
+            evaluator({}, {}, ans2),
             self.tolerance
         )
 
@@ -1886,11 +1884,11 @@ class FormulaResponse(LoncapaResponse):
         else:
             return "incorrect"
 
-    def compare_answer(self, a, b):
+    def compare_answer(self, ans1, ans2):
         """
         An external interface for comparing whether a and b are equal.
         """
-        internal_result = self.check_formula(a, b, self.samples)
+        internal_result = self.check_formula(ans1, ans2, self.samples)
         return internal_result == "correct"
 
     def validate_answer(self, answer):

common/lib/xmodule/xmodule/crowdsource_hinter.py

@@ -229,12 +229,12 @@ class CrowdsourceHinterModule(CrowdsourceHinterFields, XModule):
         # The brackets surrounding the index are for backwards compatability purposes.
         # (It used to be that each answer was paired with multiple hints in a list.)
         self.previous_answers += [[best_hint_answer, [best_hint_index]]]
-        for i in xrange(min(2, n_hints - 1)):
+        for _ in xrange(min(2, n_hints - 1)):
             # Keep making random hints until we hit a target, or run out.
             while True:
                 # random.choice randomly chooses an element from its input list.
                 # (We then unpack the item, in this case data for a hint.)
-                (hint_index, (rand_hint, votes, hint_answer)) =\
+                (hint_index, (rand_hint, _, hint_answer)) =\
                     random.choice(matching_hints.items())
                 if rand_hint not in hints:
                     break

common/lib/xmodule/xmodule/tests/test_crowdsource_hinter.py

@@ -120,9 +120,9 @@ class CHModuleFactory(object):
                 return False
         responder.validate_answer = validate_answer
 
-        def compare_answer(a, b):
+        def compare_answer(ans1, ans2):
             """ A fake answer comparer """
-            return a == b
+            return ans1 == ans2
         responder.compare_answer = compare_answer
 
         capa_module.lcp.responders = {'responder0': responder}
@@ -189,11 +189,13 @@ class VerticalWithModulesFactory(object):
 
     @staticmethod
     def next_num():
+        """Increments a global counter for naming."""
         CHModuleFactory.num += 1
         return CHModuleFactory.num
 
     @staticmethod
     def create():
+        """Make a vertical."""
         model_data = {'data': VerticalWithModulesFactory.sample_problem_xml}
         system = get_test_system()
         descriptor = VerticalDescriptor.from_xml(VerticalWithModulesFactory.sample_problem_xml, system)
@@ -532,7 +534,7 @@ class CrowdsourceHinterTest(unittest.TestCase):
         """
         mock_module = CHModuleFactory.create()
 
-        def fake_get_hint(get):
+        def fake_get_hint(_):
             """
             Creates a rendering dictionary, with which we can test
             the templates.