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Editing File: /usr/lib/python2.7/site-packages/paramiko/proxy.pyc

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    Wraps a subprocess running ProxyCommand-driven programs.

This class implements a the socket-like interface needed by the
    `.Transport` and `.Packetizer` classes. Using this class instead of a
    regular socket makes it possible to talk with a Popen'd command that will
    proxy traffic between the client and a server hosted in another machine.

Instances of this class may be used as context managers.
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        Create a new CommandProxy instance. The instance created by this
        class can be passed as an argument to the `.Transport` class.

:param str command_line:
            the command that should be executed and used as the proxy.
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        Write the content received from the SSH client to the standard
        input of the forked command.

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        Read from the standard output of the forked program.

:param int size: how many chars should be read

:return: the string of bytes read, which may be shorter than requested
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