def f():
    a :list[i32]= [1, 2, 3, 4,]
    print(a.pop(),a)
    
f()

(lp) C:\Users\kunni\lpython>python try.py
4 [1, 2, 3]

(lp) C:\Users\kunni\lpython>src\bin\lpython try.py
[1, 2, 3, 4]