1 # f.close() is not thread-safe: calling it at the same time as another

     2 # operation (or another close) on the same file, but done from another

     3 # thread, causes crashes.  The issue is more complicated than it seems,

     4 # witness the discussions in:

     5 #

     6 # http://bugs.python.org/issue595601

     7 # http://bugs.python.org/issue815646

     8 

     9 import thread

    10 

    11 while 1:

    12     f = open("multithreaded_close.tmp", "w")

    13     thread.start_new_thread(f.close, ())

    14     f.close()