decode os.urandom() bytes object

Use binascii.hexlify. It works both in Python 2.x and Python 3.x.

>>> import binascii
>>> binascii.hexlify(os.urandom(32))
b'daae7948824525c1b8b59f9d5a75e9c0404e46259c7b1e17a4654a7e73c91b87'

If you need a string object instead of a bytes object in Python 3.x, use decode():

>>> binascii.hexlify(os.urandom(32)).decode()
'daae7948824525c1b8b59f9d5a75e9c0404e46259c7b1e17a4654a7e73c91b87'