HOW DOES THIS CODE WORK? Could anyone illustrate my doubt?

Question

arr=[1,2]
def fun(n,a):
if (a is not arr):
a.append(n)
return list(a)

a=arr
a=fun(3,a)
print(a)
a=fun(4,a)
print(a)

Answer 1

Slick it works

Answer 2

1) a = arr -> a and arr same object
2)a = fun(3,a)
if statement is false,no append
create new list/arr same as a, return and assign it to variable a

note that a and arr now are different object
3)print(a) still [1,2]

4)fun(4,a)
if statement now true
append num 4 to a and assign it to var a

5)print (a) = [1,2,4]

Answer 3

You execute this code in sololearn python interpreter

Answer 4

Just execute this code in python interpreter

Answer 5

Abhay ill take your word for it. Pycharm doesnt like it

Answer 6

hi

Answer 7

আমি প্রোগ্রাম কিখতে চাই কেও কি সাহায্য করবেন..?? প্লিজ

Answer 8

Could you type in English to explain.

Answer 9

no

Answer 10

What country are you from, brother?

Answer 11

plzzz

Answer 12

It shouldnt. arr is not defined in the function

Answer 13

Just tried it, doesnt work.

Try:

if n not in a:

for the if statement