Lib/multiprocessing/forking.py - platform/external/python/cpython3 - Gitiles

 #
 # Module for starting a process object using os.fork() or CreateProcess()
 #
 # multiprocessing/forking.py
 #
 # Copyright (c) 2006-2008, R Oudkerk
 # Licensed to PSF under a Contributor Agreement.
 #

 import os
 import sys
 import signal
 import errno

 from multiprocessing import util, process

 __all__ = ['Popen', 'assert_spawning', 'duplicate', 'close', 'ForkingPickler']

 #
 # Check that the current thread is spawning a child process
 #

 def assert_spawning(self):
     if not Popen.thread_is_spawning():
         raise RuntimeError(
             '%s objects should only be shared between processes'
             ' through inheritance' % type(self).__name__
             )

 #
 # Try making some callable types picklable
 #

 from pickle import Pickler
 from copyreg import dispatch_table

 class ForkingPickler(Pickler):
     _extra_reducers = {}
     def __init__(self, *args):
         Pickler.__init__(self, *args)
         self.dispatch_table = dispatch_table.copy()
         self.dispatch_table.update(self._extra_reducers)
     @classmethod
     def register(cls, type, reduce):
         cls._extra_reducers[type] = reduce

 def _reduce_method(m):
     if m.__self__ is None:
         return getattr, (m.__class__, m.__func__.__name__)
     else:
         return getattr, (m.__self__, m.__func__.__name__)
 class _C:
     def f(self):
         pass
 ForkingPickler.register(type(_C().f), _reduce_method)


 def _reduce_method_descriptor(m):
     return getattr, (m.__objclass__, m.__name__)
 ForkingPickler.register(type(list.append), _reduce_method_descriptor)
 ForkingPickler.register(type(int.__add__), _reduce_method_descriptor)

 try:
     from functools import partial
 except ImportError:
     pass
 else:
     def _reduce_partial(p):
         return _rebuild_partial, (p.func, p.args, p.keywords or {})
     def _rebuild_partial(func, args, keywords):
         return partial(func, *args, **keywords)
     ForkingPickler.register(partial, _reduce_partial)

 #
 # Unix
 #

 if sys.platform != 'win32':
     duplicate = os.dup
     close = os.close

     #
     # We define a Popen class similar to the one from subprocess, but
     # whose constructor takes a process object as its argument.
     #

     class Popen(object):

         def __init__(self, process_obj):
             sys.stdout.flush()
             sys.stderr.flush()
             self.returncode = None

             r, w = os.pipe()
             self.sentinel = r

             self.pid = os.fork()
             if self.pid == 0:
                 os.close(r)
                 if 'random' in sys.modules:
                     import random
                     random.seed()
                 code = process_obj._bootstrap()
                 os._exit(code)

             # `w` will be closed when the child exits, at which point `r`
             # will become ready for reading (using e.g. select()).
             os.close(w)
             util.Finalize(self, os.close, (r,))

         def poll(self, flag=os.WNOHANG):
             if self.returncode is None:
                 while True:
                     try:
                         pid, sts = os.waitpid(self.pid, flag)
                     except os.error as e:
                         if e.errno == errno.EINTR:
                             continue
                         # Child process not yet created. See #1731717
                         # e.errno == errno.ECHILD == 10
                         return None
                     else:
                         break
                 if pid == self.pid:
                     if os.WIFSIGNALED(sts):
                         self.returncode = -os.WTERMSIG(sts)
                     else:
                         assert os.WIFEXITED(sts)
                         self.returncode = os.WEXITSTATUS(sts)
             return self.returncode

         def wait(self, timeout=None):
             if self.returncode is None:
                 if timeout is not None:
                     from .connection import wait
                     if not wait([self.sentinel], timeout):
                         return None
                 # This shouldn't block if wait() returned successfully.
                 return self.poll(os.WNOHANG if timeout == 0.0 else 0)
             return self.returncode

         def terminate(self):
             if self.returncode is None:
                 try:
                     os.kill(self.pid, signal.SIGTERM)
                 except OSError:
                     if self.wait(timeout=0.1) is None:
                         raise

         @staticmethod
         def thread_is_spawning():
             return False

 #
 # Windows
 #

 else:
     import _thread
     import msvcrt
     import _winapi

     from pickle import load, HIGHEST_PROTOCOL

     def dump(obj, file, protocol=None):
         ForkingPickler(file, protocol).dump(obj)

     #
     #
     #

     TERMINATE = 0x10000
     WINEXE = (sys.platform == 'win32' and getattr(sys, 'frozen', False))
     WINSERVICE = sys.executable.lower().endswith("pythonservice.exe")

     close = _winapi.CloseHandle

     #
     # _python_exe is the assumed path to the python executable.
     # People embedding Python want to modify it.
     #

     if WINSERVICE:
         _python_exe = os.path.join(sys.exec_prefix, 'python.exe')
     else:
         _python_exe = sys.executable

     def set_executable(exe):
         global _python_exe
         _python_exe = exe

     #
     #
     #

     def duplicate(handle, target_process=None, inheritable=False):
         if target_process is None:
             target_process = _winapi.GetCurrentProcess()
         return _winapi.DuplicateHandle(
             _winapi.GetCurrentProcess(), handle, target_process,
             0, inheritable, _winapi.DUPLICATE_SAME_ACCESS
             )

     #
     # We define a Popen class similar to the one from subprocess, but
     # whose constructor takes a process object as its argument.
     #

     class Popen(object):
         '''
         Start a subprocess to run the code of a process object
         '''
         _tls = _thread._local()

         def __init__(self, process_obj):
             cmd = ' '.join('"%s"' % x for x in get_command_line())
             prep_data = get_preparation_data(process_obj._name)

             # create pipe for communication with child
             rfd, wfd = os.pipe()

             # get handle for read end of the pipe and make it inheritable
             rhandle = duplicate(msvcrt.get_osfhandle(rfd), inheritable=True)
             os.close(rfd)

             with open(wfd, 'wb', closefd=True) as to_child:
                 # start process
                 try:
                     hp, ht, pid, tid = _winapi.CreateProcess(
                         _python_exe, cmd + (' %s' % rhandle),
                         None, None, 1, 0, None, None, None
                         )
                     _winapi.CloseHandle(ht)
                 finally:
                     close(rhandle)

                 # set attributes of self
                 self.pid = pid
                 self.returncode = None
                 self._handle = hp
                 self.sentinel = int(hp)
                 util.Finalize(self, _winapi.CloseHandle, (self.sentinel,))

                 # send information to child
                 Popen._tls.process_handle = int(hp)
                 try:
                     dump(prep_data, to_child, HIGHEST_PROTOCOL)
                     dump(process_obj, to_child, HIGHEST_PROTOCOL)
                 finally:
                     del Popen._tls.process_handle

         @staticmethod
         def thread_is_spawning():
             return getattr(Popen._tls, 'process_handle', None) is not None

         @staticmethod
         def duplicate_for_child(handle):
             return duplicate(handle, Popen._tls.process_handle)

         def wait(self, timeout=None):
             if self.returncode is None:
                 if timeout is None:
                     msecs = _winapi.INFINITE
                 else:
                     msecs = max(0, int(timeout * 1000 + 0.5))

                 res = _winapi.WaitForSingleObject(int(self._handle), msecs)
                 if res == _winapi.WAIT_OBJECT_0:
                     code = _winapi.GetExitCodeProcess(self._handle)
                     if code == TERMINATE:
                         code = -signal.SIGTERM
                     self.returncode = code

             return self.returncode

         def poll(self):
             return self.wait(timeout=0)

         def terminate(self):
             if self.returncode is None:
                 try:
                     _winapi.TerminateProcess(int(self._handle), TERMINATE)
                 except OSError:
                     if self.wait(timeout=1.0) is None:
                         raise

     #
     #
     #

     def is_forking(argv):
         '''
         Return whether commandline indicates we are forking
         '''
         if len(argv) >= 2 and argv[1] == '--multiprocessing-fork':
             assert len(argv) == 3
             return True
         else:
             return False


     def freeze_support():
         '''
         Run code for process object if this in not the main process
         '''
         if is_forking(sys.argv):
             main()
             sys.exit()


     def get_command_line():
         '''
         Returns prefix of command line used for spawning a child process
         '''
         if getattr(process.current_process(), '_inheriting', False):
             raise RuntimeError('''
             Attempt to start a new process before the current process
             has finished its bootstrapping phase.

             This probably means that you are on Windows and you have
             forgotten to use the proper idiom in the main module:

                 if __name__ == '__main__':
                     freeze_support()
                     ...

             The "freeze_support()" line can be omitted if the program
             is not going to be frozen to produce a Windows executable.''')

         if getattr(sys, 'frozen', False):
             return [sys.executable, '--multiprocessing-fork']
         else:
             prog = 'from multiprocessing.forking import main; main()'
             opts = util._args_from_interpreter_flags()
             return [_python_exe] + opts + ['-c', prog, '--multiprocessing-fork']


     def main():
         '''
         Run code specifed by data received over pipe
         '''
         assert is_forking(sys.argv)

         handle = int(sys.argv[-1])
         fd = msvcrt.open_osfhandle(handle, os.O_RDONLY)
         from_parent = os.fdopen(fd, 'rb')

         process.current_process()._inheriting = True
         preparation_data = load(from_parent)
         prepare(preparation_data)
         self = load(from_parent)
         process.current_process()._inheriting = False

         from_parent.close()

         exitcode = self._bootstrap()
         sys.exit(exitcode)


     def get_preparation_data(name):
         '''
         Return info about parent needed by child to unpickle process object
         '''
         from .util import _logger, _log_to_stderr

         d = dict(
             name=name,
             sys_path=sys.path,
             sys_argv=sys.argv,
             log_to_stderr=_log_to_stderr,
             orig_dir=process.ORIGINAL_DIR,
             authkey=process.current_process().authkey,
             )

         if _logger is not None:
             d['log_level'] = _logger.getEffectiveLevel()

         if not WINEXE and not WINSERVICE:
             main_path = getattr(sys.modules['__main__'], '__file__', None)
             if not main_path and sys.argv[0] not in ('', '-c'):
                 main_path = sys.argv[0]
             if main_path is not None:
                 if not os.path.isabs(main_path) and \
                                           process.ORIGINAL_DIR is not None:
                     main_path = os.path.join(process.ORIGINAL_DIR, main_path)
                 d['main_path'] = os.path.normpath(main_path)

         return d

 #
 # Prepare current process
 #

 old_main_modules = []

 def prepare(data):
     '''
     Try to get current process ready to unpickle process object
     '''
     old_main_modules.append(sys.modules['__main__'])

     if 'name' in data:
         process.current_process().name = data['name']

     if 'authkey' in data:
         process.current_process()._authkey = data['authkey']

     if 'log_to_stderr' in data and data['log_to_stderr']:
         util.log_to_stderr()

     if 'log_level' in data:
         util.get_logger().setLevel(data['log_level'])

     if 'sys_path' in data:
         sys.path = data['sys_path']

     if 'sys_argv' in data:
         sys.argv = data['sys_argv']

     if 'dir' in data:
         os.chdir(data['dir'])

     if 'orig_dir' in data:
         process.ORIGINAL_DIR = data['orig_dir']

     if 'main_path' in data:
         # XXX (ncoghlan): The following code makes several bogus
         # assumptions regarding the relationship between __file__
         # and a module's real name. See PEP 302 and issue #10845
         main_path = data['main_path']
         main_name = os.path.splitext(os.path.basename(main_path))[0]
         if main_name == '__init__':
             main_name = os.path.basename(os.path.dirname(main_path))

         if main_name == '__main__':
             main_module = sys.modules['__main__']
             main_module.__file__ = main_path
         elif main_name != 'ipython':
             # Main modules not actually called __main__.py may
             # contain additional code that should still be executed
             import imp

             if main_path is None:
                 dirs = None
             elif os.path.basename(main_path).startswith('__init__.py'):
                 dirs = [os.path.dirname(os.path.dirname(main_path))]
             else:
                 dirs = [os.path.dirname(main_path)]

             assert main_name not in sys.modules, main_name
             file, path_name, etc = imp.find_module(main_name, dirs)
             try:
                 # We would like to do "imp.load_module('__main__', ...)"
                 # here.  However, that would cause 'if __name__ ==
                 # "__main__"' clauses to be executed.
                 main_module = imp.load_module(
                     '__parents_main__', file, path_name, etc
                     )
             finally:
                 if file:
                     file.close()

             sys.modules['__main__'] = main_module
             main_module.__name__ = '__main__'

             # Try to make the potentially picklable objects in
             # sys.modules['__main__'] realize they are in the main
             # module -- somewhat ugly.
             for obj in list(main_module.__dict__.values()):
                 try:
                     if obj.__module__ == '__parents_main__':
                         obj.__module__ = '__main__'
                 except Exception:
                     pass
	#
	# Module for starting a process object using os.fork() or CreateProcess()
	#
	# multiprocessing/forking.py
	#
	# Copyright (c) 2006-2008, R Oudkerk
	# Licensed to PSF under a Contributor Agreement.
	#

	import os
	import sys
	import signal
	import errno

	from multiprocessing import util, process

	__all__ = ['Popen', 'assert_spawning', 'duplicate', 'close', 'ForkingPickler']

	#
	# Check that the current thread is spawning a child process
	#

	def assert_spawning(self):
	if not Popen.thread_is_spawning():
	raise RuntimeError(
	'%s objects should only be shared between processes'
	' through inheritance' % type(self).__name__
	)

	#
	# Try making some callable types picklable
	#

	from pickle import Pickler
	from copyreg import dispatch_table

	class ForkingPickler(Pickler):
	_extra_reducers = {}
	def __init__(self, *args):
	Pickler.__init__(self, *args)
	self.dispatch_table = dispatch_table.copy()
	self.dispatch_table.update(self._extra_reducers)
	@classmethod
	def register(cls, type, reduce):
	cls._extra_reducers[type] = reduce

	def _reduce_method(m):
	if m.__self__ is None:
	return getattr, (m.__class__, m.__func__.__name__)
	else:
	return getattr, (m.__self__, m.__func__.__name__)
	class _C:
	def f(self):
	pass
	ForkingPickler.register(type(_C().f), _reduce_method)


	def _reduce_method_descriptor(m):
	return getattr, (m.__objclass__, m.__name__)
	ForkingPickler.register(type(list.append), _reduce_method_descriptor)
	ForkingPickler.register(type(int.__add__), _reduce_method_descriptor)

	try:
	from functools import partial
	except ImportError:
	pass
	else:
	def _reduce_partial(p):
	return _rebuild_partial, (p.func, p.args, p.keywords or {})
	def _rebuild_partial(func, args, keywords):
	return partial(func, args, *keywords)
	ForkingPickler.register(partial, _reduce_partial)

	#
	# Unix
	#

	if sys.platform != 'win32':
	duplicate = os.dup
	close = os.close

	#
	# We define a Popen class similar to the one from subprocess, but
	# whose constructor takes a process object as its argument.
	#

	class Popen(object):

	def __init__(self, process_obj):
	sys.stdout.flush()
	sys.stderr.flush()
	self.returncode = None

	r, w = os.pipe()
	self.sentinel = r

	self.pid = os.fork()
	if self.pid == 0:
	os.close(r)
	if 'random' in sys.modules:
	import random
	random.seed()
	code = process_obj._bootstrap()
	os._exit(code)

	# `w` will be closed when the child exits, at which point `r`
	# will become ready for reading (using e.g. select()).
	os.close(w)
	util.Finalize(self, os.close, (r,))

	def poll(self, flag=os.WNOHANG):
	if self.returncode is None:
	while True:
	try:
	pid, sts = os.waitpid(self.pid, flag)
	except os.error as e:
	if e.errno == errno.EINTR:
	continue
	# Child process not yet created. See #1731717
	# e.errno == errno.ECHILD == 10
	return None
	else:
	break
	if pid == self.pid:
	if os.WIFSIGNALED(sts):
	self.returncode = -os.WTERMSIG(sts)
	else:
	assert os.WIFEXITED(sts)
	self.returncode = os.WEXITSTATUS(sts)
	return self.returncode

	def wait(self, timeout=None):
	if self.returncode is None:
	if timeout is not None:
	from .connection import wait
	if not wait([self.sentinel], timeout):
	return None
	# This shouldn't block if wait() returned successfully.
	return self.poll(os.WNOHANG if timeout == 0.0 else 0)
	return self.returncode

	def terminate(self):
	if self.returncode is None:
	try:
	os.kill(self.pid, signal.SIGTERM)
	except OSError:
	if self.wait(timeout=0.1) is None:
	raise

	@staticmethod
	def thread_is_spawning():
	return False

	#
	# Windows
	#

	else:
	import _thread
	import msvcrt
	import _winapi

	from pickle import load, HIGHEST_PROTOCOL

	def dump(obj, file, protocol=None):
	ForkingPickler(file, protocol).dump(obj)

	#
	#
	#

	TERMINATE = 0x10000
	WINEXE = (sys.platform == 'win32' and getattr(sys, 'frozen', False))
	WINSERVICE = sys.executable.lower().endswith("pythonservice.exe")

	close = _winapi.CloseHandle

	#
	# _python_exe is the assumed path to the python executable.
	# People embedding Python want to modify it.
	#

	if WINSERVICE:
	_python_exe = os.path.join(sys.exec_prefix, 'python.exe')
	else:
	_python_exe = sys.executable

	def set_executable(exe):
	global _python_exe
	_python_exe = exe

	#
	#
	#

	def duplicate(handle, target_process=None, inheritable=False):
	if target_process is None:
	target_process = _winapi.GetCurrentProcess()
	return _winapi.DuplicateHandle(
	_winapi.GetCurrentProcess(), handle, target_process,
	0, inheritable, _winapi.DUPLICATE_SAME_ACCESS
	)

	#
	# We define a Popen class similar to the one from subprocess, but
	# whose constructor takes a process object as its argument.
	#

	class Popen(object):
	'''
	Start a subprocess to run the code of a process object
	'''
	_tls = _thread._local()

	def __init__(self, process_obj):
	cmd = ' '.join('"%s"' % x for x in get_command_line())
	prep_data = get_preparation_data(process_obj._name)

	# create pipe for communication with child
	rfd, wfd = os.pipe()

	# get handle for read end of the pipe and make it inheritable
	rhandle = duplicate(msvcrt.get_osfhandle(rfd), inheritable=True)
	os.close(rfd)

	with open(wfd, 'wb', closefd=True) as to_child:
	# start process
	try:
	hp, ht, pid, tid = _winapi.CreateProcess(
	_python_exe, cmd + (' %s' % rhandle),
	None, None, 1, 0, None, None, None
	)
	_winapi.CloseHandle(ht)
	finally:
	close(rhandle)

	# set attributes of self
	self.pid = pid
	self.returncode = None
	self._handle = hp
	self.sentinel = int(hp)
	util.Finalize(self, _winapi.CloseHandle, (self.sentinel,))

	# send information to child
	Popen._tls.process_handle = int(hp)
	try:
	dump(prep_data, to_child, HIGHEST_PROTOCOL)
	dump(process_obj, to_child, HIGHEST_PROTOCOL)
	finally:
	del Popen._tls.process_handle

	@staticmethod
	def thread_is_spawning():
	return getattr(Popen._tls, 'process_handle', None) is not None

	@staticmethod
	def duplicate_for_child(handle):
	return duplicate(handle, Popen._tls.process_handle)

	def wait(self, timeout=None):
	if self.returncode is None:
	if timeout is None:
	msecs = _winapi.INFINITE
	else:
	msecs = max(0, int(timeout * 1000 + 0.5))

	res = _winapi.WaitForSingleObject(int(self._handle), msecs)
	if res == _winapi.WAIT_OBJECT_0:
	code = _winapi.GetExitCodeProcess(self._handle)
	if code == TERMINATE:
	code = -signal.SIGTERM
	self.returncode = code

	return self.returncode

	def poll(self):
	return self.wait(timeout=0)

	def terminate(self):
	if self.returncode is None:
	try:
	_winapi.TerminateProcess(int(self._handle), TERMINATE)
	except OSError:
	if self.wait(timeout=1.0) is None:
	raise

	#
	#
	#

	def is_forking(argv):
	'''
	Return whether commandline indicates we are forking
	'''
	if len(argv) >= 2 and argv[1] == '--multiprocessing-fork':
	assert len(argv) == 3
	return True
	else:
	return False


	def freeze_support():
	'''
	Run code for process object if this in not the main process
	'''
	if is_forking(sys.argv):
	main()
	sys.exit()


	def get_command_line():
	'''
	Returns prefix of command line used for spawning a child process
	'''
	if getattr(process.current_process(), '_inheriting', False):
	raise RuntimeError('''
	Attempt to start a new process before the current process
	has finished its bootstrapping phase.

	This probably means that you are on Windows and you have
	forgotten to use the proper idiom in the main module:

	if __name__ == '__main__':
	freeze_support()
	...

	The "freeze_support()" line can be omitted if the program
	is not going to be frozen to produce a Windows executable.''')

	if getattr(sys, 'frozen', False):
	return [sys.executable, '--multiprocessing-fork']
	else:
	prog = 'from multiprocessing.forking import main; main()'
	opts = util._args_from_interpreter_flags()
	return [_python_exe] + opts + ['-c', prog, '--multiprocessing-fork']


	def main():
	'''
	Run code specifed by data received over pipe
	'''
	assert is_forking(sys.argv)

	handle = int(sys.argv[-1])
	fd = msvcrt.open_osfhandle(handle, os.O_RDONLY)
	from_parent = os.fdopen(fd, 'rb')

	process.current_process()._inheriting = True
	preparation_data = load(from_parent)
	prepare(preparation_data)
	self = load(from_parent)
	process.current_process()._inheriting = False

	from_parent.close()

	exitcode = self._bootstrap()
	sys.exit(exitcode)


	def get_preparation_data(name):
	'''
	Return info about parent needed by child to unpickle process object
	'''
	from .util import _logger, _log_to_stderr

	d = dict(
	name=name,
	sys_path=sys.path,
	sys_argv=sys.argv,
	log_to_stderr=_log_to_stderr,
	orig_dir=process.ORIGINAL_DIR,
	authkey=process.current_process().authkey,
	)

	if _logger is not None:
	d['log_level'] = _logger.getEffectiveLevel()

	if not WINEXE and not WINSERVICE:
	main_path = getattr(sys.modules['__main__'], '__file__', None)
	if not main_path and sys.argv[0] not in ('', '-c'):
	main_path = sys.argv[0]
	if main_path is not None:
	if not os.path.isabs(main_path) and \
	process.ORIGINAL_DIR is not None:
	main_path = os.path.join(process.ORIGINAL_DIR, main_path)
	d['main_path'] = os.path.normpath(main_path)

	return d

	#
	# Prepare current process
	#

	old_main_modules = []

	def prepare(data):
	'''
	Try to get current process ready to unpickle process object
	'''
	old_main_modules.append(sys.modules['__main__'])

	if 'name' in data:
	process.current_process().name = data['name']

	if 'authkey' in data:
	process.current_process()._authkey = data['authkey']

	if 'log_to_stderr' in data and data['log_to_stderr']:
	util.log_to_stderr()

	if 'log_level' in data:
	util.get_logger().setLevel(data['log_level'])

	if 'sys_path' in data:
	sys.path = data['sys_path']

	if 'sys_argv' in data:
	sys.argv = data['sys_argv']

	if 'dir' in data:
	os.chdir(data['dir'])

	if 'orig_dir' in data:
	process.ORIGINAL_DIR = data['orig_dir']

	if 'main_path' in data:
	# XXX (ncoghlan): The following code makes several bogus
	# assumptions regarding the relationship between __file__
	# and a module's real name. See PEP 302 and issue #10845
	main_path = data['main_path']
	main_name = os.path.splitext(os.path.basename(main_path))[0]
	if main_name == '__init__':
	main_name = os.path.basename(os.path.dirname(main_path))

	if main_name == '__main__':
	main_module = sys.modules['__main__']
	main_module.__file__ = main_path
	elif main_name != 'ipython':
	# Main modules not actually called __main__.py may
	# contain additional code that should still be executed
	import imp

	if main_path is None:
	dirs = None
	elif os.path.basename(main_path).startswith('__init__.py'):
	dirs = [os.path.dirname(os.path.dirname(main_path))]
	else:
	dirs = [os.path.dirname(main_path)]

	assert main_name not in sys.modules, main_name
	file, path_name, etc = imp.find_module(main_name, dirs)
	try:
	# We would like to do "imp.load_module('__main__', ...)"
	# here. However, that would cause 'if __name__ ==
	# "__main__"' clauses to be executed.
	main_module = imp.load_module(
	'__parents_main__', file, path_name, etc
	)
	finally:
	if file:
	file.close()

	sys.modules['__main__'] = main_module
	main_module.__name__ = '__main__'

	# Try to make the potentially picklable objects in
	# sys.modules['__main__'] realize they are in the main
	# module -- somewhat ugly.
	for obj in list(main_module.__dict__.values()):
	try:
	if obj.__module__ == '__parents_main__':
	obj.__module__ = '__main__'
	except Exception:
	pass