[Python编程(第4版)].(Programming.Python.4th.Edition).Mark.Lutz.文字版

>>> pipe.wait() 42 >>> call('python testexit_sys.py') Bye sys world 42 >>> pipe = Popen('python teste ...

print('Hello from child', os.getpid(), exitstat) os._exit(exitstat) print('never reached') def parent(): while True: newpid = os ...

import _thread as thread exitstat = 0 def child(): global exitstat # process global names exitstat += 1 # shared by all threads ...

I tried, it hung the entire process on my Linux system and killed every thread in the process on Windows!). The alternative thre ...

already seen in this and the prior chapters. For example, the following simple mecha- nisms can all be interpreted as cross-prog ...

manuals and website for more details on other IPC schemes if you’re looking for some- thing more specific. After this section, w ...

Example 5-19. PP4E\System\Processes\pipe1.py import os, time def child(pipeout): zzz = 0 while True: time.sleep(zzz) # make pare ...

Parent 6716 got [b'Spam 001'] at 1267996125.63 ...etc.: Ctrl-C to exit... Notice how the parent received a bytes string through ...

else: # in parent, listen to pipe os.close(pipeout) # close output side here pipein = os.fdopen(pipein) # make text mode input f ...

Example 5-21. PP4E\System\Processes\pipe-thread.py anonymous pipes and threads, not processes; this version works on Windows imp ...

sent commands to the non-GUI debugger’s input stream pipe and parsed the results that showed up in the debugger’s output stream ...

mypid = os.getpid() spawn('python', 'pipes-testchild.py', 'spam') # fork child program print('Hello 1 from parent', mypid) # to ...

To test this utility, the self-test code at the end of the file spawns the program shown in Example 5-23 in a child process and ...

wind up in a deadlock state, both blocked on input calls waiting for events that never occur. Technically, by default stdout is ...

not written in Python, for which neither manual flush calls nor -u are an option. See “More on Stream Buffering: pty and Pexpect ...

arguments to file creation tools, or manually call sys.stdout.flush() in the spawned program. The pty module is also not availab ...

Named pipe basics In Python, named pipe files are created with the os.mkfifo call, which is available today on Unix-like platfor ...

window and then the child is started in another. Messages start appearing in the parent window only after the child is started a ...

Socket basics Although sockets are one of the most commonly used IPC tools, it’s impossible to fully grasp their API without als ...

sock.close() # up to 1024 bytes in message print('client got: [%s]' % reply) if name == 'main': from threading import Thread sth ...