Py2Enum

Реализация Enum-а для python 2 с возможностью применения побитовых флагов.

Example:

myEnum = Enum('First','dfdf','rt')
val = myEnum( myEnum.First + myEnum.rt )
if val == 'First':
    print val.__sum__()

Добавлены условия сочетания флагов (см. файл Example):

In Optional you can specify the condition for compatible flags of your enum. In example I have specified on incompatible flags for first and second bits if first bit is 0 and second if not 0. This feature is rarely needed, but can be very useful.

So. In example for e(2) its give out the error, becaurse 2 = 1 0. For e(3) it works, becaurse 3 = 1 1. But it is just example! You can specify any condition for flag bits which you need or work without its

Practice:

You can also apply lambda expression for the condition. Same as in method check in example.py only shorter:

e = Enum('first','dfdf','rt').Optional(lambda a: a & 3 != 2) 

Or same for man readable:

e = Enum('first','dfdf','rt')

e.Optional(lambda val: val & (e.first + e.dfdf) != (not e.first) + e.dfdf)

And check its:

e(3) # works

e(2) # error