python中怎么调用线程
Python调用线程有两种情况,一种是在主线程中直接调用,还一种是直接在其他方法中调用线程
在传递参数的方式上有所区别,两种调用方法如下
1. 主进程中直接调用线程:
from threading import Thread import time def sayhi(name,input,number): for i in range(1,10): if number == "线程号1": time.sleep(2) print("这是线程号:%s - %s say hello %s - %s" % (number,name, str(i),input)) else : time.sleep(1) print("线程号:%s - %s say hello %s - %s 休息1秒" % (number,name, str(i),input)) if __name__ == '__main__': for i in range(1,3): t = Thread(target=sayhi, args=('mike','to you',"线程号"+str(i) )) t.start() print("主线程结束")
2.在方法中调用线程:
在方法中调用线程的时候,如果不想另外写一个class,也不想用self参数,
在写Thread(target=Th2, args=(input,))的时候,记得args数的最后中加一个“逗号”,这样表明你传的是一个数据元组
否则会报“takes 1 positional argument but 2 were given”这种错误,因为传入的参数数量识别时出现了问题
# -*- coding: utf-8 -*- import time from threading import Thread def doWork(input): global interval try: print("begin") if "DERNAV" in input.upper(): t = Thread(target=Th1, args=(input,)) t.start() elif "PBD9008" in input.upper(): t = Thread(target=Th2, args=(input,)) t.start() except Exception as e : print(e) def Th1(input): for i in range(1,10): print(input+"_"+time.strftime('%Y.%m.%d %H:%M:%S')) time.sleep(1) def Th2(input): for i in range(1,10): print(input+"_"+time.strftime('%Y.%m.%d %H:%M:%S')) time.sleep(2) def run(interval): while True: try: doWork("PBD9008") doWork("DERNAV") time_remaining = interval - time.time() % interval time.sleep(time_remaining) except Exception as e: print(e) if __name__ == '__main__': global interval interval = 300 text = run(interval)
来源:PY学习网:原文地址:https://www.py.cn/article.html