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[IMP] util/misc: cache unique functions #47

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[IMP] util/misc: cache unique functions #47

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11 changes: 6 additions & 5 deletions src/util/misc.py
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Original file line number Diff line number Diff line change
Expand Up @@ -30,14 +30,15 @@


def _cached(func):
sentinel = object()
func._cache = {}

@functools.wraps(func)
def wrapper(*args, **kwargs):
result = getattr(func, "_result", sentinel)
if result == sentinel:
result = func._result = func(*args, **kwargs)
return result
key = (args, tuple(sorted(kwargs.items())))

if key not in func._cache:
func._cache[key] = func(*args, **kwargs)
return func._cache[key]

return wrapper

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