Error in my code?

[ebolisa]

There obviously is a problem with the calling code that appears when it is called from inside a function. Without seeing where the error is appearing it is difficult to see where the error occurred.

This code has no errors because it works when a == 1.

x = 5 / a

Never mind that it fails when a == 0. That is a problem with a, not the code.

Not sure I follow you. I'm passing 4 variables outside or within a function. x (0 position) is not used.

 x = sys.argv[0]
    a = sys.argv[1]
    b = sys.argv[2]
    c = sys.argv[3]
    d = sys.argv[4]