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FIX: Python 2.7-3.7.1 compatible NonDaemonPool #2754

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merged 4 commits into from Oct 25, 2018
Merged

FIX: Python 2.7-3.7.1 compatible NonDaemonPool #2754

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117c97b
FIX: Python 2.7-3.7.1 compatible NonDaemonPool
effigies Oct 25, 2018
5aea316
FIX: Empty lists for 3.4<=Python<3.7, missing import for 3.7
effigies Oct 25, 2018
8031fac
FIX: Full-on monkey patch
effigies Oct 25, 2018
c9a787e
STY: Cleanup + unused import [skip ci]
effigies Oct 25, 2018
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30 changes: 15 additions & 15 deletions nipype/pipeline/plugins/legacymultiproc.py
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Expand Up @@ -11,7 +11,7 @@

# Import packages
import os
from multiprocessing import Process, Pool, cpu_count, pool
from multiprocessing import Pool, cpu_count, pool
from traceback import format_exception
import sys
from logging import INFO
Expand Down Expand Up @@ -74,23 +74,23 @@ def run_node(node, updatehash, taskid):
return result


class NonDaemonProcess(Process):
"""A non-daemon process to support internal multiprocessing.
"""

def _get_daemon(self):
return False

def _set_daemon(self, value):
pass

daemon = property(_get_daemon, _set_daemon)


class NonDaemonPool(pool.Pool):
"""A process pool with non-daemon processes.
"""
Process = NonDaemonProcess
def Process(self, *args, **kwds):
proc = super(NonDaemonPool, self).Process(*args, **kwds)

class NonDaemonProcess(proc.__class__):
"""Monkey-patch process to ensure it is never daemonized"""
@property
def daemon(self):
return False

@daemon.setter
def daemon(self, val):
pass
proc.__class__ = NonDaemonProcess
return proc


class LegacyMultiProcPlugin(DistributedPluginBase):
Expand Down