Steven D'Aprano <[EMAIL PROTECTED]> writes:
> It isn't a bug in Python. At worst, it is a "gotcha", but it is a
> deliberate design decision, and quite useful. For example, this is good
> for caching complicated calculations:
>
> def function(x, _cache={}):
> # _cache is initialised to an empty dictionary at compile time
> if _cache.has_key(x):
> return _cache[x]
The above can be done explicitly:
def function(x):
if function._cache.has_key(x):
return function._cache[x]
...
# function gets an initially-empty cache
function._cache = {}
So the existing behavior, while not a bug (since it's documented), may
well be a wart.
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