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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def thishost():
 """Return the IP addresses of the current host."""

    global _thishost
    if _thishost is None:
        try:
            _thishost = tuple(socket.gethostbyname_ex(socket.gethostname())[2])
        except socket.gaierror:
            _thishost = tuple(socket.gethostbyname_ex('localhost')[2])
    return _thishost