How to make def x(*a, b=1) work on python2?

Asked Dec 17 '18 at 05:46

Active Dec 17 '18 at 05:54

Viewed 39 times

def x(*a, b=1) is valid syntax on python3, but invalid on python2.

I know below work on python2

def x(*a, **kwargs):
    b=kwargs.get('b', 1)

But I just wonder if there any syntax patch can make python 2 compatible with def x(*a, b=1) ? So that I don't need change all my code.

edited Dec 17 '18 at 05:54

asked Dec 17 '18 at 05:46

Mithril

There isn't. Refer to [Python 3 best practice argument order](https://stackoverflow.com/questions/38169978/python-3-best-practice-argument-order) for why – ycx Dec 17 '18 at 05:50
1

@AdamSmith That won't work because `b` would then be considered the first positional argument. – blhsing Dec 17 '18 at 05:50
@Adam Smith No, you can't . If you do that, first variable in list a would through into b – Mithril Dec 17 '18 at 05:50
@blhsing eh true. Deleted – Adam Smith Dec 17 '18 at 05:54

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