C:\Users\<user>\AppData\Local\Programs\Python\Python37-32\lib\site-packages\swagger_spec_validator\validator20.py:53: SwaggerValidationWarning: Found "$ref: #/definitions/UserPreferences" with siblings that will be overwritten. See https://stackoverflow.com/a/48114924 for more information. (path #/definitions/User/properties/preferences)
  ref_dict['$ref'], '/'.join(path),
C:\Users\<user>\AppData\Local\Programs\Python\Python37-32\lib\site-packages\bravado_core\spec.py:292: Warning: guid format is not registered with bravado-core!
  category=Warning,
Traceback (most recent call last):
  File "bitmex-wallet-parser.py", line 150, in <module>
    t[field] = x[field].strftime('%Y-%m-%d %H:%M:%S.%f')
AttributeError: 'NoneType' object has no attribute 'strftime'