Implementation of selection sort algorithm with python 3

selection_sort.py

def selection_sort(L):
    n = len(L)

    for i in range(0, n-1):
        index_min = i

        for j in range(i+1, n):
            if L[j] < L[index_min]:
                index_min = j
                
        if index_min != i:
            L[i], L[index_min] = L[index_min], L[i]


if __name__ == "__main__":
    L = [10, 5, 2, 8, 7]
    print("Before sort:", L)
    selection_sort(L)
    print("After sort:", L)