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Create a pool key out of a request context dictionary.
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key for an HTTPS request. If you wish to change this behaviour, provide
alternate callables to ``key_fn_by_scheme``.
:param key_class:
The class to use when constructing the key. This should be a namedtuple
with the ``scheme`` and ``host`` keys at a minimum.
:type key_class: namedtuple
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A dictionary-like object that contain the context for a request.
:type request_context: dict
:return: A namedtuple that can be used as a connection pool key.
:rtype: PoolKey
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Allows for arbitrary requests while transparently keeping track of
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:param num_pools:
Number of connection pools to cache before discarding the least
recently used pool.
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Headers to include with all requests, unless other headers are given
explicitly.
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Additional parameters are used to create fresh
:class:`urllib3.connectionpool.ConnectionPool` instances.
Example::
>>> manager = PoolManager(num_pools=2)
>>> r = manager.request('GET', 'http://google.com/')
>>> r = manager.request('GET', 'http://google.com/mail')
>>> r = manager.request('GET', 'http://yahoo.com/')
>>> len(manager.pools)
2
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Create a new :class:`ConnectionPool` based on host, port, scheme, and
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Empty our store of pools and direct them all to close.
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Get a :class:`ConnectionPool` based on the host, port, and scheme.
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Get a :class:`ConnectionPool` based on the request context.
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value must be a key in ``key_fn_by_scheme`` instance variable.
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Get a :class:`ConnectionPool` based on the provided pool key.
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``port`` fields.
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Similar to :func:`urllib3.connectionpool.connection_from_url`.
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not used.
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Merge a dictionary of override values for self.connection_pool_kw.
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Same as :meth:`urllib3.connectionpool.HTTPConnectionPool.urlopen`
with custom cross-host redirect logic and only sends the request-uri
portion of the ``url``.
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:class:`urllib3.connectionpool.ConnectionPool` can be chosen for it.
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Behaves just like :class:`PoolManager`, but sends all requests through
the defined proxy, using the CONNECT method for HTTPS URLs.
:param proxy_url:
The URL of the proxy to be used.
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A dictionary contaning headers that will be sent to the proxy. In case
of HTTP they are being sent with each request, while in the
HTTPS/CONNECT case they are sent only once. Could be used for proxy
authentication.
Example:
>>> proxy = urllib3.ProxyManager('http://localhost:3128/')
>>> r1 = proxy.request('GET', 'http://google.com/')
>>> r2 = proxy.request('GET', 'http://httpbin.org/')
>>> len(proxy.pools)
1
>>> r3 = proxy.request('GET', 'https://httpbin.org/')
>>> r4 = proxy.request('GET', 'https://twitter.com/')
>>> len(proxy.pools)
3
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