[Solved] More ‘Pythonic’ way to write asymmetric if-else statement

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I figure this out finally. Assignment Expressions in Python 3.8 is what I am looking for.

if name in name_dict:
    info = name_dict['name'] ## <-- may be a more complicated function
    if info == '':
        info = input("Input your info: ")
else:
    info = input("Input your info: ")

Can be turn into:

if (name not in name_dict) or (name in name_dict and (info := name_dict['name']) == ''):
    info = input("Input your info: ")

It is like expressing the logic in natural language. ‘If name is not in name dictionary, or the info of name in name dictionary is empty, please input some info.’

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solved More ‘Pythonic’ way to write asymmetric if-else statement