Return and set
ben+python at benfinney.id.au
Tue Jul 19 15:43:17 CEST 2011
<81282ed9a88799d21e77957df2d84bd6514d9af6 at myhashismyemail.com> writes:
> I have a method getToken() which checks to see if a value is set, and
> if so, return it. However, it doesn't feel pythonic to me:
Clearly that's because the function name is not Pythonic :-)
I'll assume the name is a PEP-8 compatible ‘get_token’.
> def getToken(self):
> if self.tok:
> t = self.tok
> self.tok = None
> return t
> # ...
Are you testing ‘self.tok’ in a boolean context because you don't care
whether it it might be ‘""’ or ‘0’ or ‘0.0’ or ‘’ or ‘False’ or lots
of other things that evaluate false in a boolean context?
If you want to test whether it is any value other than ‘None’, that's
not the way to do it. Instead, use ‘if self.token is not None’.
But I don't see why you test it at all, in that case, since you're
immediately setting it to ‘None’ afterward.
Also, the function name is quite misleading; the implication for a
function named ‘get_foo’ is that it is a non-destructive read. I would
expect the name of this function to indicate what's going on much more
result = self.token
self.token = None
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