利用多线程机制编写程序,输出一个问候语,要求每隔1秒钟输出一个字符。用2种方法分别创建线程。

方法一：使用Thread类创建线程

import threading
import time

def print_char(char):
    while True:
        print(char, end='')
        time.sleep(1)

if __name__ == '__main__':
    thread1 = threading.Thread(target=print_char, args=('H',))
    thread2 = threading.Thread(target=print_char, args=('i',))
    thread1.start()
    thread2.start()

方法二：使用继承Thread类的子类创建线程

import threading
import time

class PrintCharThread(threading.Thread):
    def __init__(self, char):
        super().__init__()
        self.char = char
    
    def run(self):
        while True:
            print(self.char, end='')
            time.sleep(1)

if __name__ == '__main__':
    thread1 = PrintCharThread('H')
    thread2 = PrintCharThread('i')
    thread1.start()
    thread2.start()