python访问你自己的公网ip地址的代码

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import urllib,random,re

ip_regex = re.compile("(([0-9]{1,3}.){3}[0-9]{1,3})")

def public_ip():
    ''' Returns your public IP address.
        Output: The IP address in string format. 
                None if not internet connection available.
    '''
    # List of host which return the public IP address:
    for i in range(3):
        host = random.choice(hosts)
        try:
            results = ip_regex.findall(urllib.urlopen(host).read(200000))
            if results: return results[0][0]
        except:
            pass # Let's try another host
    return None