Checking Task

Question

Help me plz to decide some task.
Write a function that will take a list of non-negative integers, sort them so that they make up the largest possible number. For example, [50, 2, 1, 9], the largest generated number is 95021.
My trying:
mass = [9, 988, 9, 9, 82]
def max_num():
b=""
a=[str(m) for m in mass]
for i in sorted(a, reverse=True):
b+=i
print (b)
It not true. My result: 98899982, but should be 99998882

Answer 1

from __future__ import division
a = [50, 5, 51, 59, 2, 1, 9, 98]
def fractionalize(i):
divisor = 9
while divisor < i:
divisor = 10 * divisor + 9
return i / divisor
print(sorted(a, key=fractionalize, reverse=True))

Answer 2

Malcolm , thank you.