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A select() based reactor - runs on all POSIX platforms and on Win32.
@ivar _reads: A set containing L{FileDescriptor} instances which will be
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@ivar _writes: A set containing L{FileDescriptor} instances which will be
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Initialize file descriptor tracking dictionaries and the base class.
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Run one iteration of the I/O monitor loop.
This will run all selectables who had input or output readiness
waiting for them.
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Add a FileDescriptor for notification of data available to read.
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Add a FileDescriptor for notification of data available to write.
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Remove a Selectable for notification of data available to read.
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Remove a Selectable for notification of data available to write.
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