TypeError: write() argument must be str, not bytes (Python 3 vs Python 2 )

Question

The below code works perfectly for python 2.7.13

import os
with open(\'random.bin\',\'w\') as f:
    f.write(os.urandom(10))

But throws error f

Answer 1

In Python 3 it makes a difference whether you open the file in binary or text mode. Just add the b flag to make it binary:

with open('random.bin','wb') as f:

This works in Python 2 too.