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August 20, 2018 15:45
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Learning python parameters. Curious how to do a mix of arguments, with *args, keyword arguments with *kwargs
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| #!/usr/local/bin/python3 | |
| ### Chris. Fauerbach. | |
| ### MIT License. | |
| ### Most flexible callback method signature if you have | |
| ### required and commonly expected keyword arguments | |
| # fn | |
| # callback is a required argument | |
| # *args is everything optional | |
| # counter is a named argument with a default value | |
| # **kwargs is a way to get ANY other keyword arguments | |
| def fn(callback, *args, counter=0, **kwargs): | |
| print("-----------------") | |
| print("fn: ", callback) | |
| print(args) | |
| print(kwargs) | |
| print(kwargs['fake']) | |
| if __name__ == "__main__": | |
| fn("dog", fake="one") | |
| """ | |
| ----------------- | |
| fn: dog | |
| () | |
| {'fake': 'one'} | |
| one | |
| """ | |
| fn("cat", "one", "two", fake='fake', counter=10, undefined=12) | |
| """ | |
| ----------------- | |
| fn: cat | |
| ('one', 'two') | |
| {'fake': 'fake', 'undefined': 12} | |
| fake | |
| """ | |
| fn("heather","another", fake="one") | |
| """ | |
| ----------------- | |
| fn: heather | |
| ('another',) | |
| {'fake': 'one'} | |
| one | |
| """ | |
| fn("frankenstein", fake="one") | |
| """ | |
| ----------------- | |
| fn: frankenstein | |
| () | |
| {'fake': 'one'} | |
| one | |
| """ |
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