import time

import threading

from threading import local

class Foo(local):

    pass

# 实例化(创建)对象

foo = Foo()

# 给Foo类添加静态变量

def add(i):

    foo.num = i

    time.sleep(1)

    # threading.current_thread().ident 线程PID

    print(foo.num, i, threading.current_thread().ident)

for i in range(20):

    # 开启多线程

    th = threading.Thread(target=add, args=(i,))

    th.start()