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小編給大家分享一下python中多進(jìn)程并行的示例分析,希望大家閱讀完這篇文章之后都有所收獲,下面讓我們一起去探討吧!
代碼:
from multiprocessing import Process import sys, os import time def timetask(string): while True: print(string) def works(func, arg, worknum): proc_record = [] for i in range(worknum): p = Process(target = func, args = (i,)) p.start() proc_record.append(p) for p in proc_record: p.join() if __name__ == '__main__': arg = 5 procs = 4 works(timetask, arg, procs)
效果圖【未加鎖,會發(fā)現(xiàn)數(shù)字1沒出現(xiàn),進(jìn)程間資源搶奪導(dǎo)致】:
優(yōu)化之后效果:
代碼:
from multiprocessing import Process import sys, os import time from threading import Lock def timetask(string): mutex.acquire() while True: print(string) if mutex.locked(): mutex.release() mutex = Lock() def works(func, arg, worknum): proc_record = [] for i in range(worknum): p = Process(target = func, args = (i,)) p.start() proc_record.append(p) for p in proc_record: p.join() if __name__ == '__main__': arg = 5 procs = 4 works(timetask, arg, procs)
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