>>> import sys
>>> tellme = lambda x: [k for k, v in sys._getframe(1).f_locals.iteritems() if
>>> v == x]
>>> a=1
>>> tellme(a)
['a']
Michael Spencer wrote:
> David Hirschfield wrote:
> > I'm not sure this is possible, but it sure would help me if I could do it.
> >
> > Can a function learn the name of the variable that the caller used to
> > pass it a value? For example:
> >
> > def test(x):
> > print x
> >
> > val = 100
> > test(val)
> >
> > Is it possible for function "test()" to find out that the variable it is
> > passed, "x", was called "val" by the caller?
> > Some kind of stack inspection?
>
> Perhaps, but don't try it ;-)
> >
> > Any help greatly appreciated,
> > -David
> >
> Can't you use keyword arguments?
>
> >>> def test(**kw):
> ... print kw
> ...
> >>> test(val=3)
> {'val': 3}
> >>> test(val=3, otherval = 4)
> {'otherval': 4, 'val': 3}
> >>>
>
> Michael
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