Python array not working

Question

This is so simple! Why isnt it working?!?!?

My python program...

def main():
    mont = []
    mont[0] = \"bnkj1\"
    mont[1] = \"bnkj2\"
    mont[2] =          


        

Answer 1

Python doesn't allow you to append just by assigning to an index out of the range of the list. You need to use .append instead:

def main():
    mont = []
    mont.append("bnkj1")
    mont.append("bnkj2")
    mont.append("bnkj3")

    print(mont[0])

main()

Answer 2

def main():
    mont = []           # <- this is a zero-length list
    mont[0] = "bnkj1"   # <- there is no mont[0] to assign to

Answer 3

This avoids building an empty list and then appending to it thrice.

def main():
    mont = ["bnkj1", "bnkj2", "bnkj3"]
    print(mont[0])

main()

Answer 4

The problem is that you need to specify the list size when you initialize it to use it like you do. You get an error because the list you defined has length 0. So accessing on any index will be out of range.

def main():
    mont = [None]*3
    mont[0] = "bnkj1"
    mont[1] = "bnkj2"
    mont[2] = "bnkj3"

    print(mont[0])

main()

alternativ you can use .append() to increase the size and adding an element.