using lambda to print everything in a list

[Marcin 'Qrczak' Kowalczyk]

Sat, 28 Apr 2001 13:33:22 +0200, Christian Tanzer <tanzer at swing.co.at> pisze:

>     map (lambda s : s.capitalize (), l)
> 
> I wouldn't call a loop clearer in this case, despite the lambda.
> 
> For strings, one could of course pass `string.capitalize' to `map'.
> Unfortunately, this loop hole exists only for strings, and the
> powers that be plan on making the string module obsolete, anyway.

You can abstract away the pattern of calling a method on the argument
(but it's probably too tricky to be generally liked):


from __future__ import nested_scopes

class Arg:
    def __getattr__(self, name):
        return lambda *args, **kwargs: lambda obj: getattr(obj, name)(*args, **kwargs)
arg = Arg()

map(arg.capitalize(), l)


Unfortunately it works only for called methods, i.e.
    map(arg.field, l)
won't work.

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 __("<  Marcin Kowalczyk * qrczak at knm.org.pl http://qrczak.ids.net.pl/
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QRCZAK