Download .gitignore files from github

download.gitignore.py

#!/usr/bin/env python

import sys,urllib2,json

data={}
raw_data = "raw_data"
parsed_data = "parsed_data"
file_names = "file_names"
def exit():
    sys.exit("----")

def load():
    data[raw_data] = urllib2.urlopen("https://api.github.com/repos/github/gitignore/git/trees/HEAD")
    data[parsed_data] = json.loads(data[raw_data].read())
    data[file_names] = [filename['path'].split('.gitignore')[0] for filename in data[parsed_data]['tree']]

def help():
    print """
NAME
       download.gitignore - download .gitignore files from github.com/github/gitignore repo

USAGE
    download.gitignore.py [list|download] [number] [destination path]
"""

def list_files():
    load()
    for i in range(data[file_names].__len__()):
        print i,":",data[file_names][i]
    print """
USE 
    download.gitignore.py [download|d] [number] [path] 
    to download a file
    """

def download(number,path):
    from subprocess import call
    load()
    base_url = "https://raw.github.com/github/gitignore/master/"
    file_name = data[file_names][number]+".gitignore"
    params = ["wget",base_url+file_name,"-O","\""+path+"\""]
    print "Calling ",params
    call(["wget",base_url+file_name,"-O",path])

def main():
    try:
        if sys.argv[1] == "help":
            help()
            exit()
        elif sys.argv[1] == "list" or sys.argv[1] == "l":
            list_files()
        elif sys.argv[1] == "download" or sys.argv[1] == "d":
            download(int(sys.argv[2]),sys.argv[3])
    except IndexError:
        help()
        exit()

if __name__ == '__main__':
    main()