import threadingimport timeimport randomthreading_namespace = threading.local() # 命名空间def print_country():    thread_name = threading.current_thread().getName()    country = threading_namespace.country      # 获取变量    print('{}  {}'.format(thread_name, country))def my_func(country):    threading_namespace.country = country  # 设置变量        for i in range(4):        time.sleep(random.randrange(1,7))        print_country()        if __name__ == '__main__':        countries = ['America','China','Jappen','Russia']        threads = []    for country in countries:        threads.append(threading.Thread(target= my_func, args=(country,)))    for t in threads:        t.start()            for t in threads:        t.join()