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PEP 416: add the default value of a function argument use case

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Victor Stinner 2012-03-04 00:07:10 +01:00
parent dda1526b8d
commit 6e7b0815b4
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pep-0416.txt
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@ -42,6 +42,8 @@ Use cases:
* frozendict avoids the need of a read-only proxy in some cases. frozendict is * frozendict avoids the need of a read-only proxy in some cases. frozendict is
faster than a proxy because getting an item in a frozendict is a fast lookup faster than a proxy because getting an item in a frozendict is a fast lookup
whereas a proxy requires a function call. whereas a proxy requires a function call.
* use a frozendict as the default value of function argument: avoid the
problem of mutable default argument.
Constraints Constraints