python - How to merge list and a variable using lambda function

Question

I am trying to make a lambda function that basically works like an .append() function, I can't figure out how to do it.

y = lambda l,x: [l,x]
y([3,4,5],2)

This code returns "[[3, 4, 5], 2]", but i want it to return "[3, 4, 5, 2]"

question from:https://stackoverflow.com/questions/65942383/how-to-merge-list-and-a-variable-using-lambda-function

Answer 1

A lambda really isn't supposed to be used as a named function just make an actual function or use the append function. But if this is necessary:

y = lambda l,x: [*l,x]

Although a def would be more appropriate and can also be done in one line:

def y(l,x): return [*l,x]