minor: Refine import style

Author: abawchen

graphene_mongo/advanced_types.py

@@ -1,30 +1,20 @@
+import mongoengine
 import graphene
 
-from mongoengine import Document
-from mongoengine.fields import (
-    IntField,
-    StringField,
-)
-
 from .types import MongoengineObjectType
 
-__all__ = [
-    'PointFieldType',
-    'MultiPolygonFieldType'
-]
-
 
 def _resolve_type_coordinates(self, info):
     return self['coordinates']
 
 
-class FsFile(Document):
+class FsFile(mongoengine.Document):
 
     meta = {'collection': 'fs.files'}
-    content_type = StringField(name='contentType')
-    chunk_size = IntField(name='chunkSize')
-    length = IntField()
-    md5 = StringField()
+    content_type = mongoengine.StringField(name='contentType')
+    chunk_size = mongoengine.IntField(name='chunkSize')
+    length = mongoengine.IntField()
+    md5 = mongoengine.StringField()
 
 
 class FsFileType(MongoengineObjectType):