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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 _default_make_pool(http, proxy_info):
 """Creates a urllib3.PoolManager object that has SSL verification enabled and uses the certifi certificates."""


    if not http.ca_certs:
        http.ca_certs = _certifi_where_for_ssl_version()

    ssl_disabled = http.disable_ssl_certificate_validation

    cert_reqs = 'CERT_REQUIRED' if http.ca_certs and not ssl_disabled else None

    if isinstance(proxy_info, collections.Callable):
        proxy_info = proxy_info()
    if proxy_info:
        if proxy_info.proxy_user and proxy_info.proxy_pass:
            proxy_url = 'http://{}:{}@{}:{}/'.format(
                proxy_info.proxy_user, proxy_info.proxy_pass,
                proxy_info.proxy_host, proxy_info.proxy_port,
            )
            proxy_headers = urllib3.util.request.make_headers(
                proxy_basic_auth='{}:{}'.format(
                    proxy_info.proxy_user, proxy_info.proxy_pass,
                )
            )
        else:
            proxy_url = 'http://{}:{}/'.format(
                proxy_info.proxy_host, proxy_info.proxy_port,
            )
            proxy_headers = {}

        return urllib3.ProxyManager(
            proxy_url=proxy_url,
            proxy_headers=proxy_headers,
            ca_certs=http.ca_certs,
            cert_reqs=cert_reqs,
        )
    return urllib3.PoolManager(
        ca_certs=http.ca_certs,
        cert_reqs=cert_reqs,
    )