R. David Murray wrote:
On Wed, 1 Apr 2009 at 13:12, Chris Withers wrote:
Guido van Rossum wrote:
Well hold on for a minute, I remember we used to have an exec
statement in a class body in the standard library, to define some file
methods in socket.py IIRC.
But why an exec?! Surely there must be some other way to do this than
an exec?
Maybe, but this sure is gnarly code:
_s = ("def %s(self, *args): return self._sock.%s(*args)\n\n"
"%s.__doc__ = _realsocket.%s.__doc__\n")
for _m in _socketmethods:
exec _s % (_m, _m, _m, _m)
del _m, _s
I played around with this and managed to rewrite it as:
from functools import partial
from new import instancemethod
def meth(name,self,*args):
return getattr(self._sock,name)(*args)
for _m in _socketmethods:
p = partial(meth,_m)
p.__name__ = _m
p.__doc__ = getattr(_realsocket,_m).__doc__
m = instancemethod(p,None,_socketobject)
setattr(_socketobject,_m,m)
Have I missed something or is that a suitable replacement that gets rid
of the exec nastiness?
Chris
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