attributes list should always be in event object. removed revision (#63)

optimizely/event_builder.py

@@ -297,7 +297,6 @@ class EventParams(object):
     EVENT_ID = 'entity_id'
     ATTRIBUTES = 'attributes'
     DECISIONS = 'decisions'
-    REVISION = 'revision'
     TIME = 'timestamp'
     KEY = 'key'
     TAGS = 'tags'
@@ -315,12 +314,12 @@ def _add_attributes(self, attributes):
       attributes: Dict representing user attributes and values which need to be recorded.
     """
 
-    if not attributes:
-      return
-
     visitor = self.params[self.EventParams.USERS][0]
     visitor[self.EventParams.ATTRIBUTES] = []
 
+    if not attributes:
+      return
+
     for attribute_key in attributes.keys():
       attribute_value = attributes.get(attribute_key)
       # Omit falsy attribute values
@@ -340,10 +339,6 @@ def _add_source(self):
     self.params[self.EventParams.SOURCE_SDK_TYPE] = 'python-sdk'
     self.params[self.EventParams.SOURCE_SDK_VERSION] = version.__version__
 
-  def _add_revision(self):
-    """ Add datafile revision information to the event. """
-    self.params[self.EventParams.REVISION] = self.config.get_revision()
-
   def _add_time(self):
     """ Add time information to the event. """
 
@@ -371,7 +366,6 @@ def _add_common_params(self, user_id, attributes):
     self._add_visitor(user_id)
     self._add_attributes(attributes)
     self._add_source()
-    self._add_revision()
 
   def _add_required_params_for_impression(self, experiment, variation_id):
     """ Add parameters that are required for the impression event to register.

tests/test_event_builder.py

@@ -344,6 +344,7 @@ def test_create_impression_event(self):
       'project_id': '111001',
       'visitors': [{
         'visitor_id': 'test_user',
+        'attributes': [],
         'snapshots': [{
           'decisions': [{
             'variation_id': '111129',
@@ -358,7 +359,6 @@ def test_create_impression_event(self):
           }]
         }]
       }],
-      'revision': '42',
       'client_name': 'python-sdk',
       'client_version': version.__version__
     }
@@ -403,7 +403,6 @@ def test_create_impression_event__with_attributes(self):
           }]
         }]
       }],
-      'revision': '42',
       'client_name': 'python-sdk',
       'client_version': version.__version__
     }
@@ -449,7 +448,6 @@ def test_create_conversion_event__with_attributes(self):
           }]
         }]
       }],
-      'revision': '42',
       'client_name': 'python-sdk',
       'client_version': version.__version__
     }
@@ -502,7 +500,6 @@ def test_create_conversion_event__with_event_value(self):
       }],
       'account_id': '12001',
       'client_name': 'python-sdk',
-      'revision': '42'
     }
 
     with mock.patch('time.time', return_value=42.123), \
@@ -553,7 +550,6 @@ def test_create_conversion_event__with_invalid_event_value(self):
       }],
       'account_id': '12001',
       'client_name': 'python-sdk',
-      'revision': '42'
     }
 
     with mock.patch('time.time', return_value=42.123), \