[Python-ideas] Reference variable in assignment: x = foo(?)

[Corey Sarsfield]

Actually, what I wanted was to be able to reference the variable being
assigned to


On Thu, Jul 11, 2013 at 7:07 PM, David Mertz <mertz at gnosis.cx> wrote:

> On Thu, Jul 11, 2013 at 4:57 PM, Joao S. O. Bueno <jsbueno at python.org.br>wrote:
>
>> I don't know if what I miss most is the samething the OP is asking for -
>> but the idea of re-using a value retrieved in an expression in the
>> same expression - without the need
>> to assign to a temporary variable.
>>
>> Like in:
>>   value = expensive_function(b)  if expensive_function(b) else
>> default_value
>>
>> (of course this is a trivial example - but nonetheless it would require an
>> extra "if" statement to avoid the double call)
>>
>
> How about:
>
>   value = expensive_function(b) or default_value
>
> One call, exact same behavior as you request.  Available since Python 1.0.
>
>
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-- 
Corey Sarsfield
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