twisted.internet._dumbwin32proc.Process : API documentation

A process that integrates with the Twisted event loop.

If your subprocess is a python program, you need to:

Run python.exe with the '-u' command line option - this turns on unbuffered I/O. Buffering stdout/err/in can cause problems, see e.g. http://support.microsoft.com/default.aspx?scid=kb;EN-US;q1903

If you don't want Windows messing with data passed over stdin/out/err, set the pipes to be in binary mode:

import os, sys, mscvrt
msvcrt.setmode(sys.stdin.fileno(), os.O_BINARY)
msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
msvcrt.setmode(sys.stderr.fileno(), os.O_BINARY)

Method	__init__	Create a new child process.
Method	signalProcess	Send a signal to the process.
Method	write	Write data to the process' stdin.
Method	writeSequence	Write data to the process' stdin.
Method	writeToChild	Similar to `ITransport.write` but also allows the file descriptor in the child process which will receive the bytes to be specified.
Method	closeChildFD	Close a file descriptor which is connected to the child process, identified by its FD in the child process.
Method	closeStdin	Close the process' stdin.
Method	closeStderr	Close stderr.
Method	closeStdout	Close stdout.
Method	loseConnection	Close the process' stdout, in and err.
Method	outConnectionLost	Undocumented
Method	errConnectionLost	Undocumented
Method	inConnectionLost	Undocumented
Method	connectionLostNotify	Will be called 3 times, by stdout/err threads and process handle.
Method	maybeCallProcessEnded	Call processEnded on protocol after final cleanup.
Method	registerProducer	Register to receive data from a producer.
Method	unregisterProducer	Stop consuming data from a producer, without disconnecting.
Method	pauseProducing	Undocumented
Method	resumeProducing	Undocumented
Method	stopProducing	Stop producing data.
Method	__repr__	Return a string representation of the process.
Method	_getReason	Undocumented

Inherited from _PollingTimer:

Method	_addPollableResource	Undocumented
Method	_checkPollingState	Undocumented
Method	_startPolling	Undocumented
Method	_stopPolling	Undocumented
Method	_pause	Undocumented
Method	_unpause	Undocumented
Method	_reschedule	Undocumented
Method	_pollEvent	Undocumented

Inherited from BaseProcess:

Method	processEnded	This is called when the child terminates.
Method	_callProcessExited	Undocumented

Inherited from Ephemeral (via BaseProcess):

Method	__getstate__	Undocumented
Method	__setstate__	Undocumented

def __init__(self, reactor, protocol, command, args, environment, path): (source)

overrides twisted.internet._pollingfile._PollingTimer.__init__

Create a new child process.

def signalProcess(self, signalID): (source)

from twisted.internet.interfaces.IProcessTransport

Send a signal to the process.

Parameters	signalID	can be one of `"KILL"`, `"TERM"`, or `"INT"`. These will be implemented in a cross-platform manner, and so should be used if possible. an integer, where it represents a POSIX signal ID.
Raises	twisted.internet.error.ProcessExitedAlready	If the process has already exited.
	OSError	If the `os.kill` call fails with an errno different from `ESRCH`.

def _getReason(self, status): (source)

Undocumented

def write(self, data): (source)

from twisted.internet.interfaces.IConsumer

Write data to the process' stdin.

def writeSequence(self, seq): (source)

Write data to the process' stdin.

def writeToChild(self, fd, data): (source)

from twisted.internet.interfaces.IProcessTransport

Similar to ITransport.write but also allows the file descriptor in the child process which will receive the bytes to be specified.

This implementation is limited to writing to the child's standard input.

Parameters	fd	The file descriptor to which to write. Only stdin (`0`) is supported. (type: `int`)
	data	The bytes to write. (type: `str`)
Returns	`None`
Raises	KeyError	If `fd` is anything other than the stdin file descriptor (`0`).

def closeChildFD(self, fd): (source)

from twisted.internet.interfaces.IProcessTransport

Close a file descriptor which is connected to the child process, identified by its FD in the child process.

def closeStdin(self): (source)

from twisted.internet.interfaces.IProcessTransport

Close the process' stdin.

def closeStderr(self): (source)

from twisted.internet.interfaces.IProcessTransport

Close stderr.

def closeStdout(self): (source)

from twisted.internet.interfaces.IProcessTransport

Close stdout.

def loseConnection(self): (source)

from twisted.internet.interfaces.IProcessTransport

Close the process' stdout, in and err.

def outConnectionLost(self): (source)

Undocumented

def errConnectionLost(self): (source)

Undocumented

def inConnectionLost(self): (source)

Undocumented

def connectionLostNotify(self): (source)

Will be called 3 times, by stdout/err threads and process handle.

def maybeCallProcessEnded(self): (source)

overrides twisted.internet._baseprocess.BaseProcess.maybeCallProcessEnded

Call processEnded on protocol after final cleanup.

def registerProducer(self, producer, streaming): (source)

from twisted.internet.interfaces.IConsumer

This sets self to be a consumer for a producer. When this object runs out of data (as when a send(2) call on a socket succeeds in moving the last data from a userspace buffer into a kernelspace buffer), it will ask the producer to resumeProducing().

For IPullProducer providers, resumeProducing will be called once each time data is required.

For IPushProducer providers, pauseProducing will be called whenever the write buffer fills up and resumeProducing will only be called when it empties.

Parameters	streaming	`True` if `producer` provides `IPushProducer`, `False` if `producer` provides `IPullProducer`. (type: `bool`)
Returns	`None`
Raises	RuntimeError	If a producer is already registered.

t.i._.Process(_pollingfile._PollingTimer, BaseProcess) : class documentation