radix2.py

def maxF(L):
    maxlength = 0
    for k, v in L.items():
        l = len(v)
        if l > maxlength:
            maxlength = l
    return maxlength

a = [1546, 89, 989, 1131, 289, 565, 10, 2]
L = {i:str(a[i]) for i in range(len(a))}

m = maxF(L)
for k, v in L.items():
    v = (m - len(v)) * '0' + v
    L[k] = v

for x in range(m-1,-1,-1):  #iterating through all the digits
    bucket = {}
    for key in range(10):
        bucket.setdefault(key, [])

    for k, v in L.items():
        key = int(v[x])
        bucket[key].append(v)  #appending values in bucket using key as their digit

    i = 0
    for k, v in bucket.items():
        for e in v:
            L[i] = e  #getting values back to list from bucket
            i += 1

print(bucket)
print("Sorted list: ")
for k, v in L.items():
    print(str(v) + " ")  #printing sorted list