Ubuntu 10.04 - Python多处理 - 'module'对象没有属性'local'错误

时间:2010-10-13 04:27:55

标签: multiprocessing ubuntu-10.04 python-2.6

以下代码来自python 2.6手册。

from multiprocessing import Process
import os

def info(title):
    print(title)
    print('module name:', 'me')
    print('parent process:', os.getppid())
    print('process id:', os.getpid())

def f(name):
    info('function f')
    print('hello', name)

if __name__ == '__main__':
    info('main line')
    p = Process(target=f, args=('bob',))
    p.start()
    p.join()

这将创建以下堆栈跟踪:

Traceback (most recent call last):
  File "threading.py", line 1, in <module>
    from multiprocessing import Process
  File "/usr/lib/python2.6/multiprocessing/__init__.py", line 64, in <module>
    from multiprocessing.util import SUBDEBUG, SUBWARNING
  File "/usr/lib/python2.6/multiprocessing/util.py", line 287, in <module>
    class ForkAwareLocal(threading.local):
AttributeError: 'module' object has no attribute 'local'
Exception AttributeError: '_shutdown' in <module 'threading' from '/home/v0idnull/tmp/pythreads/threading.pyc'> ignored
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/usr/lib/python2.6/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/lib/python2.6/multiprocessing/util.py", line 258, in _exit_function
    info('process shutting down')
TypeError: 'NoneType' object is not callable
Error in sys.exitfunc:
Traceback (most recent call last):
  File "/usr/lib/python2.6/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/lib/python2.6/multiprocessing/util.py", line 258, in _exit_function
    info('process shutting down')
TypeError: 'NoneType' object is not callable

我对于为什么会发生这种情况完全无能为力,谷歌给了我很少的工作。

1 个答案:

答案 0 :(得分:4)

我的机器上的代码运行正常:
Ubuntu 10.10,Python 2.6.6 64位。

但是您的错误实际上是因为您有一个名为'threading.py'的文件,您正在运行此代码(请参阅堆栈跟踪详细信息)。这导致命名空间不匹配,因为多处理模块需要“真实”线程模块。尝试将您的文件重命名为'threading.py'之外的其他内容并再次运行它。

也...你发布的例子不是来自Python 2.6文档......它来自Python 3.x文档。确保您正在阅读与您正在运行的版本相匹配的文档。