Fredrik Lundh wrote:
> Steve Holden wrote:
>
>
>>>access it, and catch the NameError:
>>>
>>>try:
>>>variable
>>>except NameError:
>>
>>In a function when accessing a not-yet-bound local variable you may also
>>(as Fredrik knows but didn't bother to say) see an UnboundLocalError
Steve Holden wrote:
>> access it, and catch the NameError:
>>
>> try:
>> variable
>> except NameError:
>
> In a function when accessing a not-yet-bound local variable you may also
> (as Fredrik knows but didn't bother to say) see an UnboundLocalError
> exception,
>>> issubclas
Fredrik Lundh wrote:
(snip)
>
>variable = None
>
>... lots of code that may assign to variable ...
>
>if variable is not None:
>print "not defined"
Shouldn't that be:
if variable is None:
print "not defined"
?-)
Note to the OP: if None is a valid value for th
Fredrik Lundh wrote:
> km wrote:
>
>
>>Is there any handy untility for checking if a variable is populated at
>>runtime ?
>
>
> access it, and catch the NameError:
>
> try:
> variable
> except NameError:
In a function when accessing a not-yet-bound local variable you may als
km wrote:
> Is there any handy untility for checking if a variable is populated at
> runtime ?
access it, and catch the NameError:
try:
variable
except NameError:
print "not defined"
else:
print "defined"
leaving variables undefined is usually bad style, th
Hi all
Is there any handy untility for checking if a variable is populated at runtime ?
regards,
KM
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