twisted.internet._dumbwin32proc.Process(_pollingfile._PollingTimer, BaseProcess) class documentation

Part of twisted.internet._dumbwin32proc View Source (View In Hierarchy)

Implements interfaces: twisted.internet.interfaces.IConsumer, twisted.internet.interfaces.IProcessTransport, twisted.internet.interfaces.IProducer

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
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.

ParameterssignalIDcan 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.
Raisestwisted.internet.error.ProcessExitedAlreadyIf the process has already exited.
OSErrorIf 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.ITransport

Write data to the process' stdin.

def writeSequence(self, seq): (source)
from twisted.internet.interfaces.ITransport

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.

ParametersfdThe file descriptor to which to write. Only stdin (0) is supported. (type: int)
dataThe bytes to write. (type: bytes)
ReturnsNone
RaisesKeyErrorIf 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

Register to receive data from a producer.

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.

ParametersstreamingTrue if producer provides IPushProducer, False if producer provides IPullProducer. (type: bool)
ReturnsNone
RaisesRuntimeErrorIf a producer is already registered.
def unregisterProducer(self): (source)
from twisted.internet.interfaces.IConsumer

Stop consuming data from a producer, without disconnecting.

def pauseProducing(self): (source)
Undocumented
def resumeProducing(self): (source)
Undocumented
def stopProducing(self): (source)
from twisted.internet.interfaces.IProducer

Stop producing data.

This tells a producer that its consumer has died, so it must stop producing data for good.

def __repr__(self): (source)

Return a string representation of the process.

API Documentation for Twisted, generated by pydoctor at 2018-10-15 19:29:43.