What is right syntax to call lambda directly when it is defined

Python Help
1

I’m trying to call a lambda directly when it is defined. Is the purpose of the first pair of parentheses is to stop x (3) from coming together. Because () is higher than lambda in precedence?

Thanks

>>> (lambda x: x) (3)
3
>>> 
>>> a = lambda x: x (3)
>>> b = lambda x: x + 2
>>> a(b)
5
>>>
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2

Yes. Those parentheses prevent its being interpreted as an attempt to call a function named x within the lambda.

EDITED for clarity on March 12, 2022.

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3

Thanks Quercus

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4

In summary …

  1. Place the entire definition of the lambda in parentheses.
  2. After the closing parenthesis in the above, place the argument(s) to be passed to the lambda in parentheses.
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