What is the output logic of this python snippet?

Question

And how?

def cm():
return[lambda x: i*x for i in range(3)]
for m in cm():
print(m(1))

Answer 1

You can find a very detailed explanation here about the "why", actually the second answer from top:
https://stackoverflow.com/questions/6076270/lambda-function-in-list-comprehensions

Short version: the cm function returns a list of lambda functions. But the list comprehension is evaluated BEFORE the lambda, so the i variable reference will be the last value of range(3) in all lambda expressions, and that is 2.

When you use these lambda functions and pass them 1 as argument, they all return 2*1

Answer 2

please copy to playground to see output.
we will then discuss.
It is tricky...

Answer 3

Lambda works in strange ways inside a list comprehension.
I think we have discussed this before, check this thread too:
https://www.sololearn.com/Discuss/2180319/?ref=app

Answer 4

Tibor Santa
just wanted to ping you😂

Answer 5

Thanks Tibor Santa, I got it know