How to use 'urllib3 urlopen' in Python

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def urlopen(self, method, url, redirect=True, **kw):
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    """
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    Same as :meth:`urllib3.connectionpool.HTTPConnectionPool.urlopen`
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    with custom cross-host redirect logic and only sends the request-uri
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    portion of the ``url``.
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    The given ``url`` parameter must be absolute, such that an appropriate
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    :class:`urllib3.connectionpool.ConnectionPool` can be chosen for it.
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    """
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    u = parse_url(url)
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    conn = self.connection_from_host(u.host, port=u.port, scheme=u.scheme)
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    kw['assert_same_host'] = False
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    kw['redirect'] = False
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    if 'headers' not in kw:
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        kw['headers'] = self.headers
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    response = conn.urlopen(method, u.request_uri, **kw)
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    redirect_location = redirect and response.get_redirect_location()
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    if not redirect_location:
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        return response
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    if response.status == 303:
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        method = 'GET'
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    log.info("Redirecting %s -> %s" % (url, redirect_location))
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    kw['retries'] = kw.get('retries', 3) - 1  # Persist retries countdown
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    kw['redirect'] = redirect
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    return self.urlopen(method, redirect_location, **kw)

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def urlopen(self, method, url, body=None, headers=None, retries=3, redirect=True, assert_same_host=True):
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    if headers is None:
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        headers = {}
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    headers['Connection'] = 'Keep-Alive'
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    return super(NTLMConnectionPool, self).urlopen(method, url, body, headers, retries, redirect, assert_same_host)