Fix pep8 and pylint errors in modified files

- define new variables to shorten line lengths
- remove unused import
- indent arguments
- remove empty lines
- disable too-few-public-methods where pertinent

freetextresponse/freetextresponse.py

@@ -2,7 +2,6 @@
 This is the core logic for the Free-text Response XBlock
 """
 from enum import Enum
-import pkg_resources
 from django.db import IntegrityError
 from django.template.context import Context
 from django.template.loader import get_template
@@ -27,10 +26,10 @@
 
 @XBlock.needs("i18n")
 class FreeTextResponse(
-    EnforceDueDates,
-    MissingDataFetcherMixin,
-    StudioEditableXBlockMixin,
-    XBlock,
+        EnforceDueDates,
+        MissingDataFetcherMixin,
+        StudioEditableXBlockMixin,
+        XBlock,
 ):
     #  pylint: disable=too-many-ancestors, too-many-instance-attributes
     """
@@ -279,6 +278,9 @@ def student_view(self, context={}):
             (Fragment): The HTML Fragment for this XBlock, which determines the
             general frame of the FreeTextResponse Question.
         """
+
+        display_other_responses = self.display_other_student_responses
+
         self.runtime.service(self, 'i18n')
         context.update(
             {
@@ -292,7 +294,7 @@ def student_view(self, context={}):
                 'used_attempts_feedback': self._get_used_attempts_feedback(),
                 'visibility_class': self._get_indicator_visibility_class(),
                 'word_count_message': self._get_word_count_message(),
-                'display_other_responses': self.display_other_student_responses,
+                'display_other_responses': display_other_responses,
                 'other_responses': self.get_other_answers(),
             }
         )
@@ -589,7 +591,8 @@ def submit(self, data, suffix=''):
             # even if word count is invalid.
             self.count_attempts += 1
             self._compute_score()
-            if self.display_other_student_responses and data.get('can_record_response'):
+            display_other_responses = self.display_other_student_responses
+            if display_other_responses and data.get('can_record_response'):
                 self.store_student_response()
         result = {
             'status': 'success',
@@ -651,7 +654,8 @@ def store_student_response(self):
 
         # Want to store extra response so student can still see
         # MAX_RESPONSES answers if their answer is in the pool.
-        self.displayable_answers = self.displayable_answers[-(MAX_RESPONSES+1):]
+        response_index = -(MAX_RESPONSES+1)
+        self.displayable_answers = self.displayable_answers[response_index:]
 
     def get_other_answers(self):
         """
@@ -665,7 +669,6 @@ def get_other_answers(self):
         student_answer_incorrect = self._determine_credit() == Credit.zero
         if student_answer_incorrect or shouldnt_show_other_responses:
             return []
-
         return_list = [
             response
             for response in self.displayable_answers

freetextresponse/mixins.py

@@ -1,10 +1,11 @@
 """
 Mixins for the Free Text Response XBlock
 """
+# pylint: disable=too-few-public-methods
 import datetime
 
 
-class EnforceDueDates(object):  # pylint: disable=too-few-public-methods
+class EnforceDueDates(object):
     """
     xBlock Mixin to allow xblocks to check the due date
     (taking the graceperiod into account) of the