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How to resolve the mypy error "Returning Any from function declared to return 'Dict[str, Any]'" in Python?
I have a function that loads JSON data and is declared to return a dictionary with string keys and values of any type (Dict[str, Any]). However, mypy is raising an error stating that I am returning Any instead of a dictionary. I found a suggestion to create a new variable and assign the result of json.load(json_data) to it, but I would like to know if there is another way to resolve this error without creating a new variable.
def load_json_data(filepath: str) -> Dict[str, Any]:
with open(filepath) as json_data:
return json.load(json_data)
1 answer
You can cast the result of the expression to the desired type
def load_json_data(filepath: str) -> Dict[str, Any]:
with open(filepath) as json_data:
return cast(Dict[str, Any], json.load(json_data))
You can also just ignore the error
def load_json_data(filepath: str) -> Dict[str, Any]:
with open(filepath) as json_data:
return json.load(json_data) # type: ignore[no-any-return]
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