fix pylint errors

Author: mehdipourfar

postgres_composite_types/forms.py

@@ -36,8 +36,7 @@
 import logging
 from collections import OrderedDict
 
-from django import VERSION
-from django import forms
+from django import VERSION, forms
 from django.contrib.postgres.utils import prefix_validation_error
 from django.utils.translation import ugettext as _
 

tests/test_forms.py

@@ -123,6 +123,10 @@ def test_null_initial_data(self):
             str(form['simple_field']))
 
     def test_value_omission_check_inside_widget(self):
+        """
+        Assert that CompositeTypeWidget.value_omitted_from_data function
+        will return False when passing valid data.
+        """
         form = self.SimpleForm()
         widget = form.fields['simple_field'].widget
         self.assertFalse(