New submission from Gerrit Holl:
The OO API allows to create empty enums, i.e. without any values. However, the
functional API does not, as this will result in an IndexError as shown below:
In [1]: import enum
In [2]: class X(enum.IntFlag): pass
In [3]: Y = enum.IntFlag("Y", [])
---------------------------------------------------------------------------
IndexError Traceback (most recent call last)
<ipython-input-3-1fda5945e0b2> in <module>()
----> 1 Y = enum.IntFlag("Y", [])
~/lib/python3.6/enum.py in __call__(cls, value, names, module, qualname, type,
start)
291 return cls.__new__(cls, value)
292 # otherwise, functional API: we're creating a new Enum type
--> 293 return cls._create_(value, names, module=module,
qualname=qualname, type=type, start=start)
294
295 def __contains__(cls, member):
~/lib/python3.6/enum.py in _create_(cls, class_name, names, module, qualname,
type, start)
382 if isinstance(names, str):
383 names = names.replace(',', ' ').split()
--> 384 if isinstance(names, (tuple, list)) and isinstance(names[0],
str):
385 original_names, names = names, []
386 last_values = []
IndexError: list index out of range
----------
messages: 295559
nosy: Gerrit.Holl
priority: normal
severity: normal
status: open
title: Cannot use functional API to create enum with zero values
versions: Python 3.6
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue30616>
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