Random None when printing from raw_input [duplicate]

Answer 1

raw_input expects a string as input

>>> help(raw_input)

What you could do is the first print your prompt string and then ask for the input from the user.

import time
import sys
def typewriter(string):
    for x in string:
        sys.stdout.write(x)
        sys.stdout.flush()
        time.sleep(.01)
typewriter('Type "db" for decimal to binary, Type "bd" for binary to decimal: ')
dbbd = raw_input()