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                      If timeout is not given or is None,
                      the global default socket timeout is used

    All IMAP4rev1 commands are supported by methods of the same
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    All arguments to commands are converted to strings, except for
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    an IMAP4 literal.  If necessary (the string contains any
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    Each command returns a tuple: (type, [data, ...]) where 'type'
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    tagged response, or untagged results from command. Each 'data'
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    the data (ie: 'literal' value).

    Errors raise the exception class <instance>.error("<reason>").
    IMAP4 server errors raise <instance>.abort("<reason>"),
    which is a sub-class of 'error'. Mailbox status changes
    from READ-WRITE to READ-ONLY raise the exception class
    <instance>.readonly("<reason>"), which is a sub-class of 'abort'.

    "error" exceptions imply a program error.
    "abort" exceptions imply the connection should be reset, and
            the command re-tried.
    "readonly" exceptions imply the command should be re-tried.

    Note: to use this module, you must read the RFCs pertaining to the
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