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This module allows high-level and efficient I/O multiplexing, built upon the
`select` module primitives.
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zInvalid file object: {!r}Nr zInvalid file descriptor: {})
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? ?s A 0A? SelectorKey)r r eventsdatazSelectorKey(fileobj, fd, events, data)
Object used to associate a file object to its backing
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zFile object registered.zUnderlying file descriptor.z3Events that must be waited for on this file object.zvOptional opaque data associated to this file object.
For example, this could be used to store a per-client session ID.c ( e Zd ZdZd Zd Zd Zd Zy)_SelectorMappingz)Mapping of file objects to selector keys.c || _ y N) _selector)selfselectors r __init__z_SelectorMapping.__init__? s ! c @ t | j j S r )lenr
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BaseSelectora- Selector abstract base class.
A selector supports registering file objects to be monitored for specific
I/O events.
A file object is a file descriptor or any object with a `fileno()` method.
An arbitrary object can be attached to the file object, which can be used
for example to store context information, a callback, etc.
A selector can use various implementations (select(), poll(), epoll()...)
depending on the platform. The default `Selector` class uses the most
efficient implementation on the current platform.
Nc t )a3 Register a file object.
Parameters:
fileobj -- file object or file descriptor
events -- events to monitor (bitwise mask of EVENT_READ|EVENT_WRITE)
data -- attached data
Returns:
SelectorKey instance
Raises:
ValueError if events is invalid
KeyError if fileobj is already registered
OSError if fileobj is closed or otherwise is unacceptable to
the underlying system call (if a system call is made)
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NotImplementedErrorr r r r s r registerzBaseSelector.register_ s
* "!r c t )aj Unregister a file object.
Parameters:
fileobj -- file object or file descriptor
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SelectorKey instance
Raises:
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*not* raise OSError (even if the wrapped syscall does)
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data -- attached data
Returns:
SelectorKey instance
Raises:
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)r< r: r9 s r modifyzBaseSelector.modify s#
}}Wfd33r c t )aq Perform the actual selection, until some monitored file objects are
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Returns:
list of (key, events) for ready file objects
`events` is a bitwise mask of EVENT_READ|EVENT_WRITE
r7 )r timeouts r selectzBaseSelector.select r= r c y)zmClose the selector.
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the object is invalid but we still have it in our map. This
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