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utils/misc: document memoized limitation

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Document the issue with using memoized with mutable types.
This commit is contained in:
Sergei Trofimov 2018-11-14 13:30:07 +00:00 committed by Marc Bonnici
parent 94c1339efd
commit a3c04fc140
1 changed files with 9 additions and 1 deletions
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10
devlib/utils/misc.py
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@ -648,7 +648,15 @@ def __get_memo_id(obj):
@wrapt.decorator
def memoized(wrapped, instance, args, kwargs): # pylint: disable=unused-argument
"""A decorator for memoizing functions and methods."""
"""
A decorator for memoizing functions and methods.
.. warning:: this may not detect changes to mutable types. As long as the
memoized function was used with an object as an argument
before, the cached result will be returned, even if the
structure of the object (e.g. a list) has changed in the mean time.
"""
func_id = repr(wrapped)
def memoize_wrapper(*args, **kwargs):