def _freeze_support():
# we want to catch the two processes that are spawned by the
# multiprocessing code:
# - the semaphore tracker, which cleans up named semaphores in
# the spawn multiprocessing mode
# - the fork server, which keeps track of worker processes in
# forkserver mode.
# both of these processes are started by spawning a new copy of the
# running executable, passing it the flags from
# _args_from_interpreter_flags and then "-c" and an import statement.
# look for those flags and the import statement, then exec() the
# code ourselves.
if len(sys.argv) >= 2 and \
set(sys.argv[1:-2]) == set(_args_from_interpreter_flags()) and \
sys.argv[-2] == '-c' and \
(sys.argv[-1].startswith('from multiprocessing.semaphore_tracker import main') or \
sys.argv[-1].startswith('from multiprocessing.forkserver import main')):
exec(sys.argv[-1])
sys.exit()
if spawn.is_forking(sys.argv):
kwds = {}
for arg in sys.argv[2:]:
name, value = arg.split('=')
if value == 'None':
kwds[name] = None
else:
kwds[name] = int(value)
spawn.spawn_main(**kwds)
sys.exit()
def freeze_support(self):
#: Prevent the "spawn" subprocess creation routines from reading the __main__ method of the target module.
multiprocessing.process.ORIGINAL_DIR = None
#: Define a function for determining if the interpreter is executing inlined Python code.
def _is_executing_inline_python_code():
return \
len(sys.argv) >= 2 and \
set(sys.argv[1:-2]) == set(_args_from_interpreter_flags()) and sys.argv[-2] == '-c'
if _is_executing_inline_python_code():
code = sys.argv[-1]
if code.startswith(self.SIG_STARTING_FORK_SERVER):
exec(sys.argv[-1])
sys.exit()
if spawn.is_forking(sys.argv):
kwargs = {}
for arg in sys.argv[2:]:
k, v = arg.split('=')
if v == 'None':
kwargs[k] = None
else:
kwargs[k] = int(v)
spawn.spawn_main(**kwargs)
sys.exit()
def _freeze_support():
if 'multiprocessing.semaphore_tracker' in sys.argv[-1]:
m = re.compile('.*main\((\d+)\)$').match(sys.argv[-1])
fd = int(m.group(1))
import multiprocessing.semaphore_tracker
multiprocessing.semaphore_tracker.main(fd)
sys.exit()
if spawn.is_forking(sys.argv):
kwds = {}
for arg in sys.argv[2:]:
name, value = arg.split('=')
if value == 'None':
kwds[name] = None
else:
kwds[name] = int(value)
spawn.spawn_main(**kwds)
sys.exit()
def _freeze_support():
if 'multiprocessing.semaphore_tracker' in sys.argv[-1]:
m = re.compile('.*main\((\d+)\)$').match(sys.argv[-1])
fd = int(m.group(1))
import multiprocessing.semaphore_tracker
multiprocessing.semaphore_tracker.main(fd)
sys.exit()
if spawn.is_forking(sys.argv):
kwds = {}
for arg in sys.argv[2:]:
name, value = arg.split('=')
if value == 'None':
kwds[name] = None
else:
kwds[name] = int(value)
spawn.spawn_main(**kwds)
sys.exit()