variables with loop-local scope?

[Brian Alexander]

Alex Martelli wrote:
> Brian Alexander wrote:
> 
> 
>>I remember using a language many years ago that permitted the creation
>>of temporary, local variables within the body of a loop (and perhaps
>>other statement blocks.) Maybe it was Turing.
> 
> 
> Or C (not that exotic, but does have block-local variables, as do its
> descendants).
> 
> 
>>Can Python do this?
> 
> 
> Python's variables _automatically_ go out of scope only when a function
> terminates (you can of course explicitly delete them).  So, if you need
> "automatic going out of scope", you need a nested function.  E.g.:
> 
> 
>>for i in listOfNames:
>>   prefixMr = 'Mr'
>>   prefixMs = 'Ms'
>>
>>   if i in mansName:
>>     salutation = prefixMr + i
>>
>>   else:
>>     salutation = prefixMs + i
>>
>>   print 'Hello,' + salutation
> 
> 
> for i in listOfNames:
>    def block():
>      prefixMr = 'Mr'
>      prefixMs = 'Ms'
>  
>      if i in mansName:
>        salutation = prefixMr + i
>      else:
>        salutation = prefixMs + i
>      print 'Hello,' + salutation
>    block()
> 
> 
> Alex
> 
> 

Alex;

Many thanks. This is quite interesting.

Brian.