本文實例講述了python創建進程fork用法。分享給大家供大家參考。具體分析如下:
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 #!coding=utf-8 import os ,traceback import time ''' fork()系統調用是Unix下以自身進程創建子進程的系統調用, 一次調用,兩次返回,如果返回是0, 則是子進程,如果返回值>0,則是父進程(返回值是子進程的pid) ''' source = 10 i = 0 try: print '***********************' pid = os.fork() #這裡會返回兩次,所以下面的省略號會輸出2次 print '......' if pid == 0:#子進程 print "this is child process" source = source - 1 print 'child process source is ',source time.sleep(10) print 'child sleep done' else: #父進程 print "this is parent process" print 'parent process source is ',source time.sleep(10) print 'parent sleep done' print source except: traceback.print_exc()輸出如下:
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1 2 3 4 5 6 7 8 9 10 11 *********************** ...... this is child process child process source is 9 ...... this is parent process parent process source is 10 child sleep done 9 parent sleep done 10希望本文所述對大家的Python程序設計有所幫助。