StrEnum

Enumerable for Unicode text (stored in the unicode type).

For example:

>>> enum = StrEnum('my_enum', values=(u'One', u'Two', u'Three'))
>>> enum.validate(u'Two', 'cli') is None
True
>>> enum.validate(u'Four', 'cli')
Traceback (most recent call last):
  ...
ValidationError: invalid 'my_enum': must be one of 'One', 'Two', 'Three'