Would either of the existing solutions work for you?
class X:
def __init__(self, name):
self.name = name
@cached_property
def title(self):
print("compute title once")
return self.name.title()
@property
@lru_cache
def upper(self):
print("compute uppper once")
return self.name.upper()
obj = X("victor")
print(obj.title)
print(obj.title)
print(obj.upper)
print(obj.upper)
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