          for field in serializer.fields.values():
              if field.read_only:
                  continue
              required = field.required and method != 'PATCH'
              field = coreapi.Field(name=field.source, location='form', required=required)
              fields.append(field)
  
          return fields
  
      def get_pagination_fields(self, path, method, callback, view):
 
</s> remove     a = serializers.CharField(required=True)
 </s> add     a = serializers.CharField(required=True, help_text='A field description') </s> remove                             coreapi.Field('a', required=True, location='form'),
 </s> add                             coreapi.Field('a', required=True, location='form', description='A field description'), </s> remove                             coreapi.Field('a', required=False, location='form'),
 </s> add                             coreapi.Field('a', required=False, location='form', description='A field description'), </s> remove                             coreapi.Field('a', required=True, location='form'),
 </s> add                             coreapi.Field('a', required=True, location='form', description='A field description'),
            description = force_text(field.help_text) if field.help_text else ''
            field = coreapi.Field(
                name=field.source,
                location='form',
                required=required,
                description=description
            )
          for field in serializer.fields.values():
              if field.read_only:
                  continue
              required = field.required and method != 'PATCH'
            description = force_text(field.help_text) if field.help_text else ''
            field = coreapi.Field(
                name=field.source,
                location='form',
                required=required,
                description=description
            )
              fields.append(field)
  
          return fields
  
      def get_pagination_fields(self, path, method, callback, view):
keep keep keep keep replace keep keep keep keep keep
 Add form field descriptions to schemas (#4387) 
rest_framework/schemas.py