On Sat, 24 Apr 2010 04:19:43 -0700, Yingjie Lan wrote:
> I wanted to do something like this:
>
> while True:
> try:
> def fun(a, b=b, c=c): pass
> except NameError as ne:
> name = get_the_var_name(ne)
> locals()[name] = ''
> else: break
This won't work. Writing to locals() does not actually change the local
variables. Try it inside a function, and you will see it doesn't work:
def test():
x = 1
print(x)
locals()['x'] = 2
print(x)
A better approach would be:
try:
b
except NameError:
b = ''
# and the same for c
def fun(a, b=b, c=c):
pass
Better still, just make sure b and c are defined before you try to use
them!
> What's be best way to implement the function get_the_var_name(ne) that
> returns the name of the variable that could not be found?
'name' in locals()
--
Steven
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