How to use the requests3.core._http.util.timeout.Timeout.from_float function in requests3

def _get_timeout(self, timeout):
        """ Helper that always returns a :class:`urllib3.util.Timeout` """
        if timeout is _Default:
            return self.timeout.clone()

        if isinstance(timeout, Timeout):
            return timeout.clone()

        else:
            # User passed us an int/float. This is for backwards compatibility,
            # can be removed later
            return Timeout.from_float(timeout)

def _get_timeout(self, timeout):
        """ Helper that always returns a :class:`urllib3.util.Timeout` """
        if timeout is _Default:
            return self.timeout.clone()

        if isinstance(timeout, Timeout):
            return timeout.clone()

        else:
            # User passed us an int/float. This is for backwards compatibility,
            # can be removed later
            return Timeout.from_float(timeout)

self,
        host,
        port=None,
        timeout=Timeout.DEFAULT_TIMEOUT,
        maxsize=1,
        block=False,
        headers=None,
        retries=None,
        _proxy=None,
        _proxy_headers=None,
        **conn_kw
    ):
        ConnectionPool.__init__(self, host, port)
        RequestMethods.__init__(self, headers)
        if not isinstance(timeout, Timeout):
            timeout = Timeout.from_float(timeout)
        if retries is None:
            retries = Retry.DEFAULT
        self.timeout = timeout
        self.retries = retries
        self.pool = self.QueueCls(maxsize)
        self.block = block
        self.proxy = _proxy
        self.proxy_headers = _proxy_headers or {}
        # Fill the queue up so that doing get() on it will block properly
        for _ in xrange(maxsize):
            self.pool.put(None)
        # These are mostly for testing and debugging purposes.
        self.num_connections = 0
        self.num_requests = 0
        self.conn_kw = conn_kw
        if self.proxy:

self,
        host,
        port=None,
        timeout=Timeout.DEFAULT_TIMEOUT,
        maxsize=1,
        block=False,
        headers=None,
        retries=None,
        _proxy=None,
        _proxy_headers=None,
        **conn_kw
    ):
        ConnectionPool.__init__(self, host, port)
        RequestMethods.__init__(self, headers)
        if not isinstance(timeout, Timeout):
            timeout = Timeout.from_float(timeout)
        if retries is None:
            retries = Retry.DEFAULT
        self.timeout = timeout
        self.retries = retries
        self.pool = self.QueueCls(maxsize)
        self.block = block
        self.proxy = _proxy
        self.proxy_headers = _proxy_headers or {}
        # Fill the queue up so that doing get() on it will block properly
        for _ in xrange(maxsize):
            self.pool.put(None)
        # These are mostly for testing and debugging purposes.
        self.num_connections = 0
        self.num_requests = 0
        self.conn_kw = conn_kw
        if self.proxy: