[IronPython] Codeplex Issue:
fuzzyman at voidspace.org.uk
Wed Nov 12 08:24:10 CET 2008
Sorry to do this by email, but I'm travelling (anyone on list going to
be at PyWorks?) and the internet connection is too ropey for me to
comment directly on Codeplex.
I wanted to make a (minor!) comment regarding Codeplex issue 19488.
In general it is great - IronPython samples *should* follow PEP 8 as
much as possible (how come Ruby guys got nice method aliasing and we
didn't by the way? Hmm... maybe excessive aliasing isn't Pythonic).
*However* I'd just like to clarify the use of the double underscore
prefix on class member names.
The issue states:
"there's a class in formv8.py that has named members such as
"self._button1". I think what was actually intended here was
"self.__button1" to make button1 a pseudo-private member. We need to fix
this so new Python developers don't get confused"
Using a single underscore prefix is the *correct* way to indicate that a
member is private in Python. The purpose of the double underscore name
mangling is actually an admitted hack to avoid name collisions in
inheritance - not to provide private members.
(Today's lesson is *never* use double underscore prefix member names
unless you really have to - and even then you or someone else will still
regret it. :-) That's all - nit-pick over.
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