A python module containing functions that convert cik to ticker & ticker to cik

cikTickerConverter.py

import re
from requests import get
from bs4 import BeautifulSoup

# this is based on https://gist.github.com/dougvk/8499335
def ticker2cik(ticker):
    URL = 'http://www.sec.gov/cgi-bin/browse-edgar?CIK={}&Find=Search&owner=exclude&action=getcompany'
    CIK_RE = re.compile(r'\d{10}')

    soup = BeautifulSoup(get(URL.format(ticker)).content, "lxml")
    for span in soup.find_all('span',{'class':'companyName'}):
        matched = CIK_RE.findall(span.text)
        if len(matched): return str(matched[0])
    return '0000000000'

def cik2ticker(cik):
    URL = 'http://yahoo.brand.edgar-online.com/default.aspx?cik={}'
    RE_EXP = re.compile(r':\s+[\w\.\-\^]+\s')

    soup = BeautifulSoup(get(URL.format(cik)).content, "lxml")
    for td in soup.find_all('td',{'class':'tableTop'}):
        matched = RE_EXP.findall(td.text)
        if len(matched): return str(matched[0][1:].strip())
    return '0'