本文整理汇总了Python中multiprocessing.forking.Popen.poll方法的典型用法代码示例。如果您正苦于以下问题：Python Popen.poll方法的具体用法？Python Popen.poll怎么用？Python Popen.poll使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类multiprocessing.forking.Popen的用法示例。
在下文中一共展示了Popen.poll方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: Process
# 需要导入模块: from multiprocessing.forking import Popen [as 别名]
# 或者: from multiprocessing.forking.Popen import poll [as 别名]
class Process(object):
'''
Process objects represent activity that is run in a separate process
The class is analagous to `threading.Thread`
'''
_Popen = None
def __init__(self, group=None, target=None, name=None, args=(), kwargs={}):
assert group is None, 'group argument must be None for now'
count = _current_process._counter.next()
self._identity = _current_process._identity + (count,)
self._authkey = _current_process._authkey
self._daemonic = _current_process._daemonic
self._tempdir = _current_process._tempdir
self._parent_pid = os.getpid()
self._popen = None
self._target = target
self._args = tuple(args)
self._kwargs = dict(kwargs)
self._name = name or type(self).__name__ + '-' + \
':'.join(str(i) for i in self._identity)
def run(self):
'''
Method to be run in sub-process; can be overridden in sub-class
'''
if self._target:
self._target(*self._args, **self._kwargs)
def start(self):
'''
Start child process
'''
assert self._popen is None, 'cannot start a process twice'
assert self._parent_pid == os.getpid(), \
'can only start a process object created by current process'
assert not _current_process._daemonic, \
'daemonic processes are not allowed to have children'
_cleanup()
if self._Popen is not None:
Popen = self._Popen
else:
from multiprocessing.forking import Popen
self._popen = Popen(self)
_current_process._children.add(self)
def terminate(self):
'''
Terminate process; sends SIGTERM signal or uses TerminateProcess()
'''
self._popen.terminate()
def join(self, timeout=None):
'''
Wait until child process terminates
'''
assert self._parent_pid == os.getpid(), 'can only join a child process'
assert self._popen is not None, 'can only join a started process'
res = self._popen.wait(timeout)
if res is not None:
_current_process._children.discard(self)
def is_alive(self):
'''
Return whether process is alive
'''
if self is _current_process:
return True
assert self._parent_pid == os.getpid(), 'can only test a child process'
if self._popen is None:
return False
self._popen.poll()
return self._popen.returncode is None
@property
def name(self):
return self._name
@name.setter
def name(self, name):
assert isinstance(name, str), 'name must be a string'
self._name = name
@property
def daemon(self):
'''
Return whether process is a daemon
'''
return self._daemonic
@daemon.setter
def daemon(self, daemonic):
'''
Set whether process is a daemon
'''
assert self._popen is None, 'process has already started'
self._daemonic = daemonic
@property
#.........这里部分代码省略.........