Morse code translator.

morse.py

#!/usr/bin/env python3

from sys import argv, exit

u = "Usage: morsecode <from> <text>\nTypes: morse (m), english (e)"
e = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
m = ".- -... -.-. -.. . ..-. --. .... .. .--- -.- .-.. -- -. --- .--. --.- .-. ... - ..- ...- .-- -..- -.-- --.. ----- .---- ..--- ...-- ....- ..... -.... --... ---.. ----.".split()
english = dict(zip(e, m))
morse = dict(zip(m, e))

try:
	if len(argv) < 3:
		exit(u)
	elif argv[1].lower() in ("english", "e"):
		pre, dic, arg = " ", english, "".join(argv[2:]).upper()
	elif argv[1].lower() in ("morse", "m"):
		pre, dic, arg = "", morse, argv[2:]
	else:
		exit(u)
	print(pre.join(dic.get(x, "?") for x in arg))
except (KeyboardInterrupt, EOFError):
	print()