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Highlight the need for a wrapper in delegate #436

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Merged
faif merged 1 commit into from
May 2, 2025
Merged

Highlight the need for a wrapper in delegate #436

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10 changes: 6 additions & 4 deletions patterns/fundamental/delegation_pattern.py
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Original file line number Diff line number Diff line change
Expand Up @@ -19,13 +19,15 @@ class Delegator:
>>> delegator.p2
Traceback (most recent call last):
...
AttributeError: 'Delegate' object has no attribute 'p2'
AttributeError: 'Delegate' object has no attribute 'p2'. Did you mean: 'p1'?
>>> delegator.do_something("nothing")
'Doing nothing'
>>> delegator.do_something("something", kw=", faif!")
'Doing something, faif!'
>>> delegator.do_anything()
Traceback (most recent call last):
...
AttributeError: 'Delegate' object has no attribute 'do_anything'
AttributeError: 'Delegate' object has no attribute 'do_anything'. Did you mean: 'do_something'?
"""

def __init__(self, delegate: Delegate) -> None:
Expand All @@ -47,8 +49,8 @@ class Delegate:
def __init__(self) -> None:
self.p1 = 123

def do_something(self, something: str) -> str:
return f"Doing {something}"
def do_something(self, something: str, kw=None) -> str:
return f"Doing {something}{kw or ''}"


if __name__ == "__main__":
Expand Down