Fixed import bug.

Author: JaviCerveraIngram

connect/models/asset.py

@@ -9,7 +9,6 @@
 from .configuration import Configuration
 from .connection import Connection
 from .contract import Contract
-from .fulfillment import Fulfillment
 from .item import Item
 from .marketplace import Marketplace
 from .param import Param
@@ -149,6 +148,7 @@ def get_requests(self, config=None):
         """
         from connect.config import Config
         from connect.resources.base import ApiClient
+        from .fulfillment import Fulfillment
         text, _ = ApiClient(
             config or Config.get_instance(),
             'assets/' + self.id + '/requests').get()

connect/models/usage_listing.py

@@ -28,7 +28,7 @@ class UsageListing(BaseModel):
     """ (str) Creation time. """
 
     # Undocumented fields (they appear in PHP SDK)
-    
+
     vendor = None  # type: Company
     """ (:py:class:`.Company`) Vendor Object. """