multiisgd.py

import urllib

import requests

API_URL = 'http://is.gd/api.php?longurl='
    
def shorten(uri):
    resp = requests.get(API_URL + urllib.quote(uri), timeout=30)
    if resp: 
        return resp.text
    else: 
        return False

with open('links.txt', 'r') as f:
    out = []
    for one in f.readlines():
        one = one.strip().strip('\r\n').strip('\n')
        out.append('%s\t%s' % (one, shorten(one)))
    with open('shortened.txt', 'w+') as fo:
        fo.write('\n'.join(out))