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/usr/lib/python3/dist-packages/twisted/internet/

/usr/lib/python3/dist-packages/twisted/internet

Name	Size	Mode	Actions
iocpreactor/	-	0755	rm
test/	-	0755	rm
__pycache__/	-	0755	rm
abstract.py	19274	0644	edit dl rm
address.py	5246	0644	edit dl rm
asyncioreactor.py	10553	0644	edit dl rm
base.py	44260	0644	edit dl rm
cfreactor.py	17501	0644	edit dl rm
default.py	1942	0644	edit dl rm
defer.py	71193	0644	edit dl rm
endpoints.py	77207	0644	edit dl rm
epollreactor.py	8493	0644	edit dl rm
error.py	12645	0644	edit dl rm
fdesc.py	3223	0644	edit dl rm
gireactor.py	6123	0644	edit dl rm
glib2reactor.py	1115	0644	edit dl rm
gtk2reactor.py	3614	0644	edit dl rm
gtk3reactor.py	2252	0644	edit dl rm
inotify.py	14691	0644	edit dl rm
interfaces.py	96515	0644	edit dl rm
kqreactor.py	10292	0644	edit dl rm
main.py	1054	0644	edit dl rm
pollreactor.py	6026	0644	edit dl rm
posixbase.py	26357	0644	edit dl rm
process.py	38896	0644	edit dl rm
protocol.py	27134	0644	edit dl rm
pyuisupport.py	817	0644	edit dl rm
reactor.py	1863	0644	edit dl rm
selectreactor.py	6215	0644	edit dl rm
serialport.py	2317	0644	edit dl rm
ssl.py	8444	0644	edit dl rm
stdio.py	1045	0644	edit dl rm
task.py	31119	0644	edit dl rm
tcp.py	54908	0644	edit dl rm
threads.py	3953	0644	edit dl rm
tksupport.py	2045	0644	edit dl rm
udp.py	18569	0644	edit dl rm
unix.py	21965	0644	edit dl rm
utils.py	7876	0644	edit dl rm
win32eventreactor.py	15193	0644	edit dl rm
wxreactor.py	5263	0644	edit dl rm
wxsupport.py	1363	0644	edit dl rm
_baseprocess.py	1913	0644	edit dl rm
_dumbwin32proc.py	13107	0644	edit dl rm
_glibbase.py	12813	0644	edit dl rm
_idna.py	1397	0644	edit dl rm
_newtls.py	9332	0644	edit dl rm
_pollingfile.py	8982	0644	edit dl rm
_posixserialport.py	1995	0644	edit dl rm
_posixstdio.py	4687	0644	edit dl rm
_producer_helpers.py	3788	0644	edit dl rm
_resolver.py	8530	0644	edit dl rm
_signals.py	2718	0644	edit dl rm
_sslverify.py	71770	0644	edit dl rm
_threadedselect.py	11764	0644	edit dl rm
_win32serialport.py	4744	0644	edit dl rm
_win32stdio.py	3204	0644	edit dl rm
__init__.py	521	0644	edit dl rm

Edit: /usr/lib/python3/dist-packages/twisted/internet/utils.py (7876B)

# -*- test-case-name: twisted.test.test_iutils -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Utility methods.
"""

from __future__ import division, absolute_import

import sys, warnings
from functools import wraps

from twisted.internet import protocol, defer
from twisted.python import failure
from twisted.python.compat import reraise

from io import BytesIO

def _callProtocolWithDeferred(protocol, executable, args, env, path, reactor=None):
    if reactor is None:
        from twisted.internet import reactor

d = defer.Deferred()
    p = protocol(d)
    reactor.spawnProcess(p, executable, (executable,)+tuple(args), env, path)
    return d

class _UnexpectedErrorOutput(IOError):
    """
    Standard error data was received where it was not expected.  This is a
    subclass of L{IOError} to preserve backward compatibility with the previous
    error behavior of L{getProcessOutput}.

@ivar processEnded: A L{Deferred} which will fire when the process which
        produced the data on stderr has ended (exited and all file descriptors
        closed).
    """

def __init__(self, text, processEnded):
        IOError.__init__(self, "got stderr: %r" % (text,))
        self.processEnded = processEnded

class _BackRelay(protocol.ProcessProtocol):
    """
    Trivial protocol for communicating with a process and turning its output
    into the result of a L{Deferred}.

@ivar deferred: A L{Deferred} which will be called back with all of stdout
        and, if C{errortoo} is true, all of stderr as well (mixed together in
        one string).  If C{errortoo} is false and any bytes are received over
        stderr, this will fire with an L{_UnexpectedErrorOutput} instance and
        the attribute will be set to L{None}.

@ivar onProcessEnded: If C{errortoo} is false and bytes are received over
        stderr, this attribute will refer to a L{Deferred} which will be called
        back when the process ends.  This C{Deferred} is also associated with
        the L{_UnexpectedErrorOutput} which C{deferred} fires with earlier in
        this case so that users can determine when the process has actually
        ended, in addition to knowing when bytes have been received via stderr.
    """

def __init__(self, deferred, errortoo=0):
        self.deferred = deferred
        self.s = BytesIO()
        if errortoo:
            self.errReceived = self.errReceivedIsGood
        else:
            self.errReceived = self.errReceivedIsBad

def errReceivedIsBad(self, text):
        if self.deferred is not None:
            self.onProcessEnded = defer.Deferred()
            err = _UnexpectedErrorOutput(text, self.onProcessEnded)
            self.deferred.errback(failure.Failure(err))
            self.deferred = None
            self.transport.loseConnection()

def errReceivedIsGood(self, text):
        self.s.write(text)

def outReceived(self, text):
        self.s.write(text)

def processEnded(self, reason):
        if self.deferred is not None:
            self.deferred.callback(self.s.getvalue())
        elif self.onProcessEnded is not None:
            self.onProcessEnded.errback(reason)

def getProcessOutput(executable, args=(), env={}, path=None, reactor=None,
                     errortoo=0):
    """
    Spawn a process and return its output as a deferred returning a L{bytes}.

@param executable: The file name to run and get the output of - the
                       full path should be used.

@param args: the command line arguments to pass to the process; a
                 sequence of strings. The first string should B{NOT} be the
                 executable's name.

@param env: the environment variables to pass to the process; a
                dictionary of strings.

@param path: the path to run the subprocess in - defaults to the
                 current directory.

@param reactor: the reactor to use - defaults to the default reactor

@param errortoo: If true, include stderr in the result.  If false, if
        stderr is received the returned L{Deferred} will errback with an
        L{IOError} instance with a C{processEnded} attribute.  The
        C{processEnded} attribute refers to a L{Deferred} which fires when the
        executed process ends.
    """
    return _callProtocolWithDeferred(lambda d:
                                        _BackRelay(d, errortoo=errortoo),
                                     executable, args, env, path,
                                     reactor)

class _ValueGetter(protocol.ProcessProtocol):

def __init__(self, deferred):
        self.deferred = deferred

def processEnded(self, reason):
        self.deferred.callback(reason.value.exitCode)

def getProcessValue(executable, args=(), env={}, path=None, reactor=None):
    """Spawn a process and return its exit code as a Deferred."""
    return _callProtocolWithDeferred(_ValueGetter, executable, args, env, path,
                                    reactor)

class _EverythingGetter(protocol.ProcessProtocol):

def __init__(self, deferred):
        self.deferred = deferred
        self.outBuf = BytesIO()
        self.errBuf = BytesIO()
        self.outReceived = self.outBuf.write
        self.errReceived = self.errBuf.write

def processEnded(self, reason):
        out = self.outBuf.getvalue()
        err = self.errBuf.getvalue()
        e = reason.value
        code = e.exitCode
        if e.signal:
            self.deferred.errback((out, err, e.signal))
        else:
            self.deferred.callback((out, err, code))

def getProcessOutputAndValue(executable, args=(), env={}, path=None,
                             reactor=None):
    """Spawn a process and returns a Deferred that will be called back with
    its output (from stdout and stderr) and it's exit code as (out, err, code)
    If a signal is raised, the Deferred will errback with the stdout and
    stderr up to that point, along with the signal, as (out, err, signalNum)
    """
    return _callProtocolWithDeferred(_EverythingGetter, executable, args, env, path,
                                    reactor)

def _resetWarningFilters(passthrough, addedFilters):
    for f in addedFilters:
        try:
            warnings.filters.remove(f)
        except ValueError:
            pass
    return passthrough

def runWithWarningsSuppressed(suppressedWarnings, f, *a, **kw):
    """Run the function C{f}, but with some warnings suppressed.

@param suppressedWarnings: A list of arguments to pass to filterwarnings.
                               Must be a sequence of 2-tuples (args, kwargs).
    @param f: A callable, followed by its arguments and keyword arguments
    """
    for args, kwargs in suppressedWarnings:
        warnings.filterwarnings(*args, **kwargs)
    addedFilters = warnings.filters[:len(suppressedWarnings)]
    try:
        result = f(*a, **kw)
    except:
        exc_info = sys.exc_info()
        _resetWarningFilters(None, addedFilters)
        reraise(exc_info[1], exc_info[2])
    else:
        if isinstance(result, defer.Deferred):
            result.addBoth(_resetWarningFilters, addedFilters)
        else:
            _resetWarningFilters(None, addedFilters)
        return result

def suppressWarnings(f, *suppressedWarnings):
    """
    Wrap C{f} in a callable which suppresses the indicated warnings before
    invoking C{f} and unsuppresses them afterwards.  If f returns a Deferred,
    warnings will remain suppressed until the Deferred fires.
    """
    @wraps(f)
    def warningSuppressingWrapper(*a, **kw):
        return runWithWarningsSuppressed(suppressedWarnings, f, *a, **kw)
    return warningSuppressingWrapper

__all__ = [
    "runWithWarningsSuppressed", "suppressWarnings",
    "getProcessOutput", "getProcessValue", "getProcessOutputAndValue",
    ]

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