How do you add all the numbers from 1 to 10 in python?

I'm trying to write a program to add up number from 1 to n. I've managed to get it to print the numbers several times but not add them all. It keeps on just adding two of the numbers.

My 1st attempt is:

def problem1_3[n]:
    my_sum = 0
    # replace this pass [a do-nothing] statement with your code
    while my_sum