Ensure unwanted names removed in class definition
ben+python at benfinney.id.au
Thu Aug 13 00:50:52 CEST 2015
Peter Otten <__peter__ at web.de> writes:
> I would probably use a generator expression. These don't leak names:
That's an unexpected inconsistency between list comprehensions versus
generator expressions, then. Is that documented explicitly in the Python
> Python 2.7.6 (default, Jun 22 2015, 17:58:13)
> [GCC 4.8.2] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> class Parrot:
> ... a = [per for per in "abc"]
> ... b = list(trans for trans in "def")
> >>> Parrot.per
> >>> Parrot.trans
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> AttributeError: class Parrot has no attribute 'trans'
We have a winner! That's elegant, expressive, and has the right
behaviour on both Python 2 and Python 3.
\ “I turned to speak to God/About the world's despair; But to |
`\ make bad matters worse/I found God wasn't there.” —Robert Frost |
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