Can (should) this be rewritten without exec?
tjreedy at udel.edu
Wed Jun 9 23:46:31 CEST 2004
"Berthold Höllmann" <bhoel at web.de> wrote in message
news:m23c541qkd.fsf at pchoel.psh...
> class X(object):
> def a(*arg, **kw):
> """This is test a"""
> print "func a", arg, kw
> def b(*arg, **kw):
> """This is test b"""
> print "func b", arg, kw
> def __wrapper(func, *arg, **kw):
print func.__doc__ #? otherwise, this is 'pass'
> print "start wrapper"
> func(*arg, **kw)
> print "done wrapper"
> for c in ['a', 'b']:
> exec "%s = lambda *arg, **kw : __wrapper(X.%s, *arg, **kw)" % (c, c)
> exec "%s.__doc__ = X.%s.__doc__" % (c, c)
> Can this be rewritten without using 'exec'?
I near as I can understand without any explanation from you, you are double
wrapping each of the staticmethods of X and binding the result to the
original name but in globals. (This seems kind of senseless, but ;-) I
believe, without testing, the following will do something similar by using
globals() and getattr() instead of exec.
gdic = globals()
for fname in ('a', 'b'):
fob = getattr(X, fname)
ftem = lambda *arg, **kw : __wrapper(fob, *arg, **kw)
ftem.__doc__ = fob.__doc__
gdic[fname] = ftem
Terry J. Reedy
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