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    To avoid calling my_dict.get('my_key') twice, as of Python 3.8 you could use assignment expressions to do:

    my_variable = "Not None" if (value := my_dict.get("my_key")) is None else value
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  3. Stack Overflow
    https://stackoverflow.com/questions/12553938

    if statement - None value in python dictionary - Stack Overflow

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  9. People also ask
    What happens if a dict contains false values?if dict contains Falses, this will break. You could have Python do the looping in C code by using a dictionary view; this does a membership test against all values without creating a new list: (In Python 2, use dict.viewvalues () to get a dictionary view, as dict.values () returns a list there).

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    Should a dict have a loop if it contains false values?@Jon For the most part, in a duck-typed language, it should not have to, unless explicitly needed which is not clear in this case. if dict contains Falses, this will break. You could have Python do the looping in C code by using a dictionary view; this does a membership test against all values without creating a new list:

    dictionary - python - check if any value of dict is not None (without iterat…

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    Is none a valid dictionary key?None of these troubles affect None, even just because there is only one None. Any hashable value is a valid Python Dictionary Key. For this reason, None is a perfectly valid candidate. There's no confusion when looking for non-existent keys - the presence of None as a key would not affect the ability to check for whether another key was present.

    Is it reasonable to use None as a dictionary key in Python?

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    What if a key is not in a dictionary?The first option is the del function. The del function only works if the key exists in the dictionary. Otherwise, it raises a KeyError. If you are not sure if the key exists in the dictionary, use the pop method instead but make sure to specify what to do if the key does not exist. Otherwise, the pop method will also raise a KeyError.

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  10. Stack Overflow
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