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Create a pool key out of a request context dictionary.
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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.
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:rtype: PoolKey
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Allows for arbitrary requests while transparently keeping track of
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explicitly.
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Additional parameters are used to create fresh
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>>> manager = PoolManager(num_pools=2)
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Create a new :class:`urllib3.connectionpool.ConnectionPool` based on host, port, scheme, and
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Similar to :func:`urllib3.connectionpool.connection_from_url`.
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Merge a dictionary of override values for self.connection_pool_kw.
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Indicates if the proxy requires the complete destination URL in the
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Same as :meth:`urllib3.HTTPConnectionPool.urlopen`
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Behaves just like :class:`PoolManager`, but sends all requests through
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A dictionary containing headers that will be sent to the proxy. In case
of HTTP they are being sent with each request, while in the
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The proxy SSL context is used to establish the TLS connection to the
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(Defaults to False) If set to True will forward requests to the HTTPS
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private. IP address, target hostname, SNI, and port are always visible
to an HTTPS proxy even when this flag is disabled.
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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