unbinding a global variable in Python
Diez B. Roggisch
deets at nospam.web.de
Thu Apr 30 07:36:24 EDT 2009
Mark Tarver wrote:
> In Lisp this is done so
>
>> (setq *g* 0)
> 0
>
>> *g*
> 0
>
>> (makunbound '*g*)
> *g*
>
>> *g*
> error: unbound variable
>
> How is this done in Python?
>
> Mark
>>> foo = "bar"
>>> del foo
>>> foo
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'foo' is not defined
>>>
Be aware of functions that declare global variables though:
>>> def foo():
... global bar
... bar = 10
...
>>> foo()
>>> bar
10
>>> del bar
>>> bar
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'bar' is not defined
>>> foo()
>>> bar
10
Diez
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