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What is the Python SDK error: "type() argument 1 must be string, not unicode"?

Issue​

When initializing the SDK factory object in Python, this exception occurs:

    from splitio import get_factory
  File "build/bdist.macosx-10.13-intel/egg/splitio/__init__.py", line 4, in <module>
  File "build/bdist.macosx-10.13-intel/egg/splitio/factories.py", line 4, in <module>
  File "build/bdist.macosx-10.13-intel/egg/splitio/clients.py", line 8, in <module>
  File "build/bdist.macosx-10.13-intel/egg/splitio/splitters.py", line 6, in <module>
  File "build/bdist.macosx-10.13-intel/egg/splitio/hashfns/__init__.py", line 9, in <module>
  File "build/bdist.macosx-10.13-intel/egg/splitio/splits.py", line 16, in <module>
  File "build/bdist.macosx-10.13-intel/egg/splitio/matchers.py", line 15, in <module>
  File "/Library/Python/2.7/site-packages/enum/__init__.py", line 326, in __call__
    return cls._create_(value, names, module=module, type=type)
  File "/Library/Python/2.7/site-packages/enum/__init__.py", line 434, in _create_
    enum_class = metacls.__new__(metacls, class_name, bases, classdict)
  File "/Library/Python/2.7/site-packages/enum/__init__.py", line 188, in __new__
    enum_class = super(EnumMeta, metacls).__new__(metacls, cls, bases, classdict)
TypeError: type() argument 1 must be string, not unicode
type() argument 1 must be string, not unicode

Root cause​

The Python SDK requires enum34 library version 1.1.5 or above, if a lower version of enum34 installed (for example 1.0.x), or the environment is forced to use this version, the exception above is thrown when initializing SDK factory object.

Solution​

Upgrade enum34 to 1.1.5 or above using pip command. As of this article publishing date, the latest version is 1.1.6.

sudo pip install enum34 --upgrade