string to hex and back again

[Ofnuts]

If the values are from /dev/random then the real question is bytes to hex and back... In which case you just skip the utf-8 encode/decode steps (and make sure you open /dev/random in binary mode.

import codecs

with open("/dev/urandom","rb") as f:
    bytes=f.read(32)

hexbytes=codecs.encode(bytes,'hex')
print(hexbytes)
bytesback=codecs.decode(hexbytes,'hex')

print(bytesback==bytes)