InsertionSort in Python

insertionsort.py

def insertionsort(arr):
    for i in range(1,len(arr)):
        temp = arr[i]
        k = i
        while k>0 and temp < arr[k-1] :
            arr[k] = arr[k-1]
            k-=1
            arr[k] = temp


a = [999,45,343,3,34,556,233,645,2335,34,454]
print(a)
insertionsort(a)
print(a)