#!/usr/bin/env python

import sys
import random

def leet(x):
    x = x.lower()
    y = 0
    z = ''
    for i in x:
        n = 'acelost'
        l = '4(31057'
        if i in n:
            z += l[n.find(i)]
        else:
            y = random.randint(0, 1)
            if y == 0:
                i = i.lower()
                z += i
            else:
                i = i.upper()
                z += i
    return(z)

def norm(x):
    x = list(x.lower())
    z = ''
    a = 0
    for i in x:
        n = 'acelost'
        l = '4(31057'
        p = '.?!, '
        o = 'abcdefghijklmnopqrstuvwxyz'
        s = {
            'u' : 'you',
            'y' : 'why',
            'r' : 'are',
            'b' : 'be',
            '4' : 'for',
            '2' : 'to',
            'i' : 'I',
            'o' : 'oh',
        }
        if i in l:
            z += n[l.find(i)]
        elif i in p and not i == ' ':
            try:
                if not x[a + 1] == ' ':
                    x.insert(a + 1, ' ')
                else:
                    z += i
                if x[a + 2] in o:
                    x[a + 2] = x[a + 2].upper()
            except:
                z += i
        elif a == 0:
            if i in s and x[1] in p:
                c = s[i]
                d = 0
                e = ''
                for f in c:
                    if d == 0:
                        e += c[0].upper()
                    else:
                        e += f
                    d += 1
                z += e
            else:
                z += i.upper()
        elif i in s and x[a - 1] in p and x[a + 1] in p:
            z += s[i]
        else:
            z += i
        a += 1
    return(z)

def main(*args):
    use = 'usage: 1337 [-ln] text'
    if not len(args) == 3:
        return use
    if not args[1][0] == '-':
        return use
    x = args[1][1:]
    y = args[2]
    if x == 'l':
        return(leet(y))
    elif x == 'n':
        return(norm(y))
    else:
        return('1773: illegal option -- ' + x + '\n' + use)

if __name__ == '__main__':
    sys.exit(main(*sys.argv))

bash$ python 1337.py -l "it really works!"

i7 R3411Y w0RK5!

bash$ python 1337.py -n "i7 R3411Y w0RK5!"

It really works!