Regex to extract maximum numeric value from a string

import re

def extractMax(input):

numbers = re.findall('\d+',input)

numbers = map(int,numbers)

print (max(numbers))

if __name__ == "__main__":

input = '100klh564abc365bg'

extractMax(input)

Pigeonhole Sort

def pigeonhole_sort(a):

my_min = min(a)

my_max = max(a)

size = my_max - my_min + 1

holes = [0] * size

for x in a:

assert type(x) is int, "integers only please"

holes[x - my_min] += 1

i = 0

for count in range(size):

while holes[count] > 0:

holes[count] -= 1

a[i] = count + my_min

i += 1

a = [8, 3, 2, 7, 4, 6, 8]

print("Sorted order is : ", end =" ")

pigeonhole_sort(a)

for i in range(0, len(a)):

print(a[i], end =" ")