New submission from Michael Newman <michael.b.new...@gmail.com>: The "16.6.1.1. The Process class" section of the multiprocessing documentation: http://docs.python.org/dev/py3k/library/multiprocessing.html has errors in both examples.
The first example needs the indentation fixed on the "from" and "if" lines (remove the leading spaces). The second example has two issues: print syntax needs be updated from 2.0 to 3.0 syntax. Also, getppid is not available on win32 platforms. Below is a corrected example, which I tested successfully on on win32 and linux: # Python 3.1 (r31:73574, Jun 26 2009, 20:21:35) [MSC v.1500 32 bit (Intel)] on win32 C:\>c:\Python31\python.exe Process_with_more_info.py main line module name: __main__ parent process: None process id: 3216 function f module name: __main__ parent process: 3216 process id: 3692 hello bob # Python 3.0.1 (r301:69556, Jun 6 2009, 21:34:43) [GCC 4.3.2] on linux2 m...@www:~/files$ python3.0 Process_with_more_info.py main line module name: __main__ parent process: 19853 process id: 22544 function f module name: __main__ parent process: 22544 process id: 22545 hello bob # Start of corrected example: from multiprocessing import Process, current_process from sys import platform import os def info(title): print(title) print('module name:', __name__) if platform == 'win32': print('parent process:', current_process()._parent_pid) else: 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() # End of corrected example. I also saw this online: "os.getppid on Windows" http://d.hatena.ne.jp/chrono-meter/20090325/p1 But the license of the code is not clear, and it would make the example too confusing to insert in. Another reference: "Multiprocessing docs are not 3.0-ready" http://bugs.python.org/issue3256 Looks like some print statements fixed back then, but not sure why the examples mentioned here were not fixed. ---------- assignee: georg.brandl components: Documentation messages: 90118 nosy: georg.brandl, mnewman severity: normal status: open title: multiprocessing Process examples: print and getppid versions: Python 3.1 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue6417> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com