Fixed flake8 issues

Author: syrusakbary

sanic_graphql/graphqlview.py

@@ -1,13 +1,10 @@
-import json
-import six
 from functools import partial
 from cgi import parse_header
 
 
 from promise import Promise
 from sanic.response import HTTPResponse
 from sanic.views import HTTPMethodView
-from sanic.exceptions import SanicException
 
 from graphql.type.schema import GraphQLSchema
 from graphql.execution.executors.asyncio import AsyncioExecutor
@@ -39,7 +36,6 @@ def __init__(self, **kwargs):
             if hasattr(self, key):
                 setattr(self, key, value)
 
-
         self._enable_async = self._enable_async and isinstance(kwargs.get('executor'), AsyncioExecutor)
         assert isinstance(self.schema, GraphQLSchema), 'A Schema is required to be provided to GraphQLView.'
 
@@ -135,8 +131,7 @@ def parse_body(self, request):
         elif content_type == 'application/json':
             return load_json_body(request.body.decode('utf8'))
 
-        elif content_type == 'application/x-www-form-urlencoded' \
-          or content_type == 'multipart/form-data':
+        elif content_type in ('application/x-www-form-urlencoded', 'multipart/form-data'):
             return request.form
 
         return {}
@@ -147,7 +142,7 @@ def get_mime_type(request):
         # information provided by content_type
         if 'content-type' not in request.headers:
             return None
-        
+
         mimetype, _ = parse_header(request.headers['content-type'])
         return mimetype