Argumentless lambdas in Python?

Question

Is there a way to code:

def fn():
    return None

as a lambda, in Python?

ecatmur · Accepted Answer · 2013-03-11 14:44:11Z

12

Yes, the argument list can be omitted:

fn = lambda: None

The production from 5.12. Lambdas is:

lambda_form     ::=  "lambda" [parameter_list]: expression

The square brackets around parameter_list indicate an optional element.

answered Mar 11, 2013 at 14:44

ecatmur

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Comments

marianobianchi · Accepted Answer · 2013-03-11 14:45:20Z

1

You have to do this:

fn = lambda: None

answered Mar 11, 2013 at 14:45

marianobianchi

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dev_hero · Accepted Answer · 2023-08-10 13:44:24Z

0

to be sure that works even with positional and kewyword arguments:

fn = lambda *args, **kwargs: None

answered Aug 10, 2023 at 13:44

dev_hero

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