Default scope of variables
Neil Cerutti
neilc at norwich.edu
Fri Jul 5 09:24:43 EDT 2013
On 2013-07-04, Dave Angel <davea at davea.name> wrote:
> On 07/04/2013 01:32 AM, Steven D'Aprano wrote:
> <SNIP>
>> Well, if I ever have more than 63,000,000 variables[1] in a
>> function, I'll keep that in mind.
>>
> <SNIP>
>>
>> [1] Based on empirical evidence that Python supports names
>> with length at least up to one million characters long, and
>> assuming that each character can be an ASCII letter, digit or
>> underscore.
>
> Well, the number wouldn't be 63,000,000. Rather it'd be
> 63**1000000
You should really count only the ones somebody might actually
want to use. That's a much, much smaller number, though still
plenty big.
Inner scopes (I don't remember the official name) is a great
feature of C++. It's not the right feature for Python, though,
since Python doesn't have deterministic destruction. It wouldn't
buy much except for namespace tidyness.
for x in range(4):
print(x)
print(x) # Vader NOoooooOOOOOO!!!
Python provides deterministic destruction with a different
feature.
--
Neil Cerutti
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