In [4]:
def sort(A):
    for i in range(len(A) - 1):
        for j in range(i+1, len(A)):
            if A[i] > A[j]:
                tmp = A[i]
                A[i] = A[j]
                A[j] = tmp
    return A

In [5]:
A = [5, 4, 3, 2, 1]
print(sort(A))


[1, 2, 3, 4, 5]

In [ ]: