Tkinter和线程有一个有趣的问题：我有一个基于Tkinter的GUI和一些与mainloop一起执行的代码。如果我只做一次，它就像魅力一样。但如果我这样做两次Tkinter.Tk（）会阻止两个线程：GUI和MainThread。
这是代码（受another Tkinter vs threading topic启发）：
import Tkinter
import threading
import logging
logging.basicConfig(level=logging.DEBUG, format="%(asctime)s %(levelname)s: %(message)s")
def gui():
logging.info("Starting GUI")
root = Tkinter.Tk()
logging.info("Setup GUI")
root.after(500, root.destroy)
root.mainloop()
logging.info("Mainloop is over")
def start_gui_thread():
gui_thread = threading.Thread(None, gui, None)
gui_thread.setDaemon(True)
gui_thread.start()
return gui_thread
def test():
gui_thread = start_gui_thread()
logging.info("Do something alongside gui")
logging.info("Wait for gui to terminate")
gui_thread.join()
logging.info("thread terminated")
logging.info("--------- 1 ---------")
test()
logging.info("--------- 2 ---------")
test()
结果： winxp + python 2.7.1（默认安装）
INFO: --------- 1 ---------
INFO: Do something alongside gui
INFO: Starting GUI
INFO: Wait for gui to terminate
INFO: Setup GUI
INFO: Mainloop is over
INFO: thread terminated
INFO: --------- 2 ---------
INFO: Starting GUI
INFO: Do something alongside gui
UPD OS X 10.6.7 + python 2.7.1
的结果MacBook-Pro:~ igann$ python test.py
2012-07-05 21:01:52,939 INFO: --------- 1 ---------
2012-07-05 21:01:52,940 INFO: Starting GUI
2012-07-05 21:01:54,835 INFO: Do something alongside gui
2012-07-05 21:01:54,835 INFO: Wait for gui to terminate
2012-07-05 21:01:54,835 INFO: Setup GUI
2012-07-05 21:01:55,337 INFO: Mainloop is over
2012-07-05 21:01:55,339 INFO: thread terminated
2012-07-05 21:01:55,339 INFO: --------- 2 ---------
2012-07-05 21:01:55,339 INFO: Starting GUI
2012-07-05 21:01:55,366 INFO: Do something alongside gui
2012-07-05 21:01:55,366 INFO: Wait for gui to terminate
2012-07-05 21:01:55,367 INFO: Setup GUI
Tcl_WaitForEvent: CFRunLoop finished
Abort trap
MacBook-Pro:~ igann$
答案 0 :(得分：0)
它适用于我（OS X 10.7，Python 2.7.1），所以它可能与您的安装有关：
pu@pumbair:~/Downloads$ python test.py
2012-07-05 19:22:19,673 INFO: --------- 1 ---------
2012-07-05 19:22:19,673 INFO: Starting GUI
2012-07-05 19:22:19,674 INFO: Do something alongside guy
2012-07-05 19:22:19,918 INFO: Wait for gui to terminate
2012-07-05 19:22:19,918 INFO: Setup GUI
2012-07-05 19:22:20,422 INFO: Mainloop is over
2012-07-05 19:22:20,424 INFO: thread terminated
2012-07-05 19:22:20,424 INFO: --------- 2 ---------
2012-07-05 19:22:20,425 INFO: Starting GUI
2012-07-05 19:22:20,459 INFO: Do something alongside gui
2012-07-05 19:22:20,459 INFO: Setup GUI
2012-07-05 19:22:20,459 INFO: Wait for gui to terminate
2012-07-05 19:22:20,962 INFO: Mainloop is over
2012-07-05 19:22:20,965 INFO: thread terminated
pu@pumbair:~/Downloads$ python
Python 2.7.1 (r271:86832, Jun 25 2011, 05:09:01)
[GCC 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>
但当然，操作并不总是以相同的顺序执行（与上面的比较）：
pu@pumbair:~/Downloads$ python test.py
2012-07-05 19:27:17,827 INFO: --------- 1 ---------
2012-07-05 19:27:17,827 INFO: Starting GUI
2012-07-05 19:27:17,827 INFO: Do something alongside gui
2012-07-05 19:27:17,937 INFO: Setup GUI
2012-07-05 19:27:17,938 INFO: Wait for gui to terminate
2012-07-05 19:27:18,440 INFO: Mainloop is over
2012-07-05 19:27:18,442 INFO: thread terminated
2012-07-05 19:27:18,443 INFO: --------- 2 ---------
2012-07-05 19:27:18,443 INFO: Starting GUI
2012-07-05 19:27:18,478 INFO: Do something alongside gui
2012-07-05 19:27:18,478 INFO: Setup GUI
2012-07-05 19:27:18,479 INFO: Wait for gui to terminate
2012-07-05 19:27:18,981 INFO: Mainloop is over
2012-07-05 19:27:18,982 INFO: thread terminated
在10.6.8上使用Python 2.6.1它也有效，但是有奇怪的消息：
symacbook:Downloads putest$ python test.py
2012-07-05 21:33:49,844 INFO: --------- 1 ---------
2012-07-05 21:33:49,844 INFO: Starting GUI
2012-07-05 21:33:49,844 INFO: Do something alongside gui
2012-07-05 21:33:52,356 INFO: Wait for gui to terminate
2012-07-05 21:33:52,356 INFO: Setup GUI
2012-07-05 21:33:52,858 INFO: Mainloop is over
2012-07-05 21:33:52,859 INFO: thread terminated
2012-07-05 21:33:52,860 INFO: --------- 2 ---------
2012-07-05 21:33:52,860 INFO: Starting GUI
2012-07-05 21:33:52,892 INFO: Setup GUI
2012-07-05 21:33:52,892 INFO: Do something alongside gui
2012-07-05 21:33:52,894 INFO: Wait for gui to terminate
2012-07-05 21:33:52.894 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002d9d90 of class NSCFArray autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.896 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002d51e0 of class NSFont autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.897 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x7fff70737588 of class NSCFString autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.897 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101233b40 of class _NSThemeCloseWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.898 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e0ef0 of class NSCFArray autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.898 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002d51e0 of class NSFont autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.899 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x7fff70737588 of class NSCFString autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.899 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1170 of class _NSThemeWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.899 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x10120e9c0 of class NSCFArray autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.900 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002d51e0 of class NSFont autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.900 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x7fff70737588 of class NSCFString autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.901 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1710 of class _NSThemeWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.901 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e18e0 of class NSCFArray autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.902 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1012343e0 of class NSTrackingArea autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.902 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101234010 of class NSTrackingArea autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.903 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1910 of class NSView autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.904 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002d3550 of class NSCFArray autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.905 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1910 of class NSView autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.905 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101234840 of class NSCFArray autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.906 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1d90 of class NSCFArray autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.906 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101234870 of class __NSFastEnumerationEnumerator autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.907 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101233b40 of class _NSThemeCloseWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.907 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101233b40 of class _NSThemeCloseWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.908 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1710 of class _NSThemeWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.908 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1710 of class _NSThemeWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.908 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1170 of class _NSThemeWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.909 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1170 of class _NSThemeWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.909 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e22e0 of class NSTrackingArea autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.910 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e24d0 of class NSConcreteAttributedString autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.911 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x7fff70737588 of class NSCFString autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.911 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002d51e0 of class NSFont autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.911 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002d91f0 of class NSFont autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.912 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x7fff70737588 of class NSCFString autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.912 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e28b0 of class NSTrackingArea autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.913 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e3ab0 of class NSConcreteMapTable autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.914 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e3e30 of class NSCFArray autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.915 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1dc0 of class NSObject autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.915 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e4120 of class NSCFArray autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.916 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101234a60 of class NSMenuItem autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.916 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002ac2e0 of class NSCFNumber autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.916 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e4180 of class NSCFDictionary autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.917 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x10120e770 of class NSCFNumber autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.917 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1012031d0 of class NSCFDictionary autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.918 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101233b40 of class _NSThemeCloseWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.919 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101233b40 of class _NSThemeCloseWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.919 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1710 of class _NSThemeWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.919 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1710 of class _NSThemeWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.920 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1170 of class _NSThemeWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:52.920 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e1170 of class _NSThemeWidget autoreleased with no pool in place - just leaking
2012-07-05 21:33:53.393 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101236910 of class NSCFArray autoreleased with no pool in place - just leaking
2012-07-05 21:33:53.393 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x10120e770 of class NSCFNumber autoreleased with no pool in place - just leaking
2012-07-05 21:33:53.394 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101236ce0 of class NSCFDictionary autoreleased with no pool in place - just leaking
2012-07-05 21:33:53.394 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002e24b0 of class NSCFString autoreleased with no pool in place - just leaking
2012-07-05 21:33:53.395 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x1002ac2e0 of class NSCFNumber autoreleased with no pool in place - just leaking
2012-07-05 21:33:53.395 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101236d20 of class NSCFDictionary autoreleased with no pool in place - just leaking
2012-07-05 21:33:53.396 Python[1281:3407] *** __NSAutoreleaseNoPool(): Object 0x101236e70 of class NSCFArray autoreleased with no pool in place - just leaking
2012-07-05 21:33:53,398 INFO: Mainloop is over
2012-07-05 21:33:53,400 INFO: thread terminated