leetize.py

DICTFILE="LeetDict.txt" # http://pastebin.com/fnyFXLyN

with open(DICTFILE,"r") as f:
    temp=f.read().split("\n")

LeetDict={}

for i in temp:
    if i:
        LeetDict[i.split(":")[0]]=i.split(":")[1]

def leetize(string,leetz=("etiolsazbg","3710154289"),shorts=LeetDict):
    res=""
    for i in shorts:
        string=string.replace(i,shorts[i])
    for i in string:
        if i.lower() in leetz[0]:
            res+=leetz[1][leetz[0].index(i.lower())]
        else:res+=i
    return res