Which is the best version of this code?

Question

i write two codes.Both do se work but approach is different.i want to know which is the best approach. generally this is switch case in python.

1st approach.
def h(string,x,y):
return {
'add':x+y,
'mul':x*y,
'div':x/y,
}.get(string,None)

2nd approach
def h(string,x,y):
return {
'add':lambda :x+y,
'mul':lambda :x*y,
'div':lambda :x/y,
}.get(string, lambda :None)()

which is the best version please tell me.

Answer 1

I'd use the first version as the second one is unnecessarily complex. Theoretically, return lambda : None does the same as return None, but there really isn't any advantage to defining a temporary function that doesn't do anything but return None 🤔

Answer 2

Anna you are absolutely right. i also choose this.

Answer 3

first

Answer 4

1st