Simple python script to convert stdin to 13375p34k with limited dictionary

leet_speak.py

#!/usr/bin/env python

''' Simple Python script to convert STDIN to 13375p34k with limited dictionary '''

'''
	Usage:
		$ chmod +x leet_speak.py
		$ echo "All your base are belong to us" | leet_speak.py

'''

import sys
from string import maketrans, translate

fromAlphabet = "letsa"
toAlphabet = "13754"

try:
	translatable = sys.stdin.read()

	table = maketrans(fromAlphabet, toAlphabet)
	print(translate(translatable, table))

except:
	sys.stderr.write('No input')