l33t encoder in python

L33t.py

# -*- coding: utf-8 -*-
import random
def encode(string,Numeric=False):
    # a= ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]
    A = [4,
    "/\\",
    "@",
    "^",
    "aye",
    "∂",
    "/-\\",
    "|-\\"]
    B = [8,
    6,
    13,
    3,
    "|3",
    "ß",
    "P>",
    "|:",
    "!3",
    "(3",
    "/3",
    ")3",
    "|3"]
    C = [
    "[",
    "¢",
    "<",
    "(",
    "©"]
    D = [
    ")",
    "|o",
    "[)",
    "I>",
    "|>",
    "?",
    "T)",
    "|)",
    0]
    E = [
    3,
    "&",
    "€",
    "£",
    "є",
    "ë",
    "[-",
    "|=-"]
    F = [
    "|=",
    "ƒ",
    "|#",
    "ph",
    "/="]
    G = [
    6,
    "&",
    "(_+",
    9,
    "C-",
    "gee",
    "(γ,"]
    H = [
    "#",
    "/-/",
    "[-]",
    "]-[",
    ")-(",
    "(-)",
    ":-:",
    "|~|",
    "|-|",
    "]~[",
    "}{",
    "]-[",
    "?",
    "}-{",
    "hèch"]
    I = [
    1,
    "!",
    "|",
    "][",
    "eye",
    "3y3",
    "]",
    ":"
        ]
    J = [
    "_|",
    "_/",
    "¿",
    "</",
    "(/",
    "ʝ",
    ";"
        ]
    K = [
    "X",
    "|<",
    "|{",
    "ɮ"
        ]
    L = [
    1,
    "£",
    "1_",
    "ℓ",
    "|",
    "|_",
    "][_,"
    ]
    M =[
    "|v|",
    "[V]",
    "{V}",
    "|\/|",
    "/\/\\",
    "(u)",
    "(V)",
    "(\/)",
    "/|\\",
    "^^",
    "/|/|",
    "//.",
    ".\\",
    "/^^\\",
    "///",
    "|^^|"
    ]
    N =[
    "^/",
    "|V",
    "|\|",
    "/\/",
    "[\]",
    "<\>",
    "{\}",
    "[]\\",
    "// []",
    "/V",
    "₪"
    ]
    O =[
      0,
    "()",
    "oh",
    "[]",
    "¤",
    "°",
    "([])"  
    ]
    P =[
    "|*",
    "|o",
    "|º",
    "|^(o)",
    "|>",
    "|\"",
    "9",
    "[]D",
    "|̊",
    "|7",
    "?"
    ]
    Q =[
    "(_,)",
    "()_",
    "0_",
    "°|",
    "<|",
    "0."
    ]
    R =[
        2,
    "|?",
    "/2",
    "|^",
    "lz",
    "®",
    "[z",
    "12",
    "Я",
    "|2",
    "ʁ",
    "|²",
    ".-",
    ",-"
    ]
    S =[
    5,
    "$",
    "z",
    "§",
    "ehs",
    "es",
    "_/¯"
    ]
    T =[
    7,
    "+",
    "-|-",
    1,
    "']['",
    "†",
    "|²"
    ]
    U =[
    "(_)",
    "|_|",
    "v",
    "L|",
    "µ"
    ]
    V =[
    "\/",
    "1/",
    "|/"
    ]
    W =[
    "\/\/",
    "vv",
    "'//",
    "\\`",
    "\^/",
    "(n)",
    "\V/",
    "\X/",
    "\|/",
    "\_|_/",
    "\_:_/",
    "Ш",
    "ɰ",
    "`^/",
    "\./"
    ]
    X =[
    "><",
    "Ж",
    "}{",
    "ecks",
    "×",
    ")("
    ]
    Y =[
    "j",
    "`/",
    "Ψ",
    "φ",
    "λ",
    "Ч",
    "¥",
    "'/"
    ]
    Z =[
    "≥",
    2,
    "=/=",
    "7_",
    "~/_",
    "%",
    ">_",
    "ʒ",
    ">_",
    "-\_",
    "'/_"
    ]
    vocabulary = {
        "owned":["0wn3d"],
        "pawned": ["pwn'd","pwnt"],
        "woot":["w00t"],
        "hoot":["w00t"],
        "loot":["13wt"],
        "treasure":["13wt"],
        "item":["13wt"],
        "pwned":["pwn'd","pwnt"],
        "powned":["pwn'd","pwnt"],
        "pawns":["pwn'd","pwnt"],
        "pawn":["pwn'd","pwnt"],
        "hacker":["h4x0r"],
        "hackers":["h4x0r"],
        "fear":["ph33r","ph34r"],
        "fears":["ph33r","ph34r"],
        "skill":["sk1llz"],
        "skills":["sk1llz"],
        "mad":["m4d"],
        "crazy":["m4d"],
        "you":["j00"],
        "fool":["f00"],
        "idiot":["f00"],
        "yo":["j0"],
        "dude":["d00d"],
        "pal":["d00d"],
        "sucks":["sux0r"],
        "suck":["sux0r"],
        "lamer":["l4m3r"],
        "noob":["n00b"]
    }
    Alphabet = {
    "a":A,
    "b":B,
    "c":C,
    "d":D,
    "e":E,
    "f":F,
    "g":G,
    "h":H,
    "i":I,
    "j":J,
    "k":K,
    "l":L,
    "m":M,
    "n":N,
    "o":O,
    "p":P,
    "q":Q,
    "r":R,
    "s":S,
    "t":T,
    "u":U,
    "v":V,
    "w":W,
    "x":X,
    "y":Y,
    "z":Z
    }
    str_return = ""
    for word in string.split(" ") :
        if word in vocabulary.keys():
            str_return += (vocabulary[word][random.randint(0,len(vocabulary[word])-1)]) + " "
        else :
            temp = ""
            for c in word :
                c = c.lower()
                if c in Alphabet.keys():
                    if Numeric is False :
                        temp += str(Alphabet[c][random.randint(0,len(Alphabet[c])-1)])
                    else :
                        temp_num = []
                        for thing in Alphabet[c] :
                            if type(thing) is int :
                                temp_num.append(thing)
                        if len(temp_num) == 0 :
                            temp += c
                        else :
                            temp += str(temp_num[random.randint(0,len(temp_num)-1)])
                else :
                    temp += c
            str_return += str(temp) + " "
    return str_return[:-1]


print encode("Are my skills pawns yours little girl ?",True)

This is awesome! Quick note:

- str_return += (vocabulary[word][random.randint(0,len(vocabulary[word])-1)]) + " "
+ # Looks nicer
+ str_return += random.choice(vocabulary[word]) + " "

Same can be done with

- temp += str(Alphabet[c][random.randint(0,len(Alphabet[c])-1)])
+ temp += str(random.choice(Alphabet[c]))

I took some portion of your code to make an hexchat plugin, which can be found here. Feel free to use it, or give feedback. Thanks so much!