7.3.3

Thread对象的其他属性或方法

Thread实例对象的方法
  # isAlive(): 返回线程是否活动的。
  # getName(): 返回线程名。
  # setName(): 设置线程名。

threading模块提供的一些方法：
  # threading.currentThread(): 返回当前的线程变量。
  # threading.enumerate(): 返回一个包含正在运行的线程的list。正在运行指线程启动后、结束前，不包括启动前和终止后的线程。
  # threading.activeCount(): 返回正在运行的线程数量，与len(threading.enumerate())有相同的结果。

例子： 查看线程名字

from threading import Thread, current_thread
import time

def task():
    print("%s is running" % current_thread().getName())
    time.sleep(2)
    print("%s is done" % current_thread().getName())

if __name__ == "__main__":
    t1 = Thread(target=task,) # 其中current_thread()就是拿到t1（也就是拿到t1这对象）
    t1.start()
    print(t1.getName())
    print("主线程名字",current_thread().getName())

Thread-1 is running      # 子线程名字默认是Thread名字开头
Thread-1
主线程名字 MainThread   # 主线程名字默认是MainThread   

2. 改线程名字

from threading import Thread, current_thread
import time

def task():
    print("%s is running" % current_thread().getName())
    time.sleep(2)
    print("%s is done" % current_thread().getName())

if __name__ == "__main__":
    t1 = Thread(target=task,name="子线程") # 其中current_thread()就是拿到t1
    t1.start()
    # t1.setName("son线程")
    print(t1.getName())
    print("主线程名字",current_thread().getName())

子线程 is running
son线程
主线程名字 MainThread
son线程 is done

接下来该线程名字

from threading import Thread, current_thread
import time

def task():
    print("%s is running" % current_thread().getName())
    time.sleep(2)
    print("%s is done" % current_thread().getName())

if __name__ == "__main__":
    t1 = Thread(target=task,name="子线程") # 其中current_thread()就是拿到t1
    t1.start()
    t1.setName("son线程")  # 修改线程名字
    print(t1.getName())
    print("主线程名字",current_thread().getName()

子线程 is running
son线程
主线程名字 MainThread
son线程 is done

修改主线程名字

from threading import Thread, current_thread
import time

def task():
    print("%s is running" % current_thread().getName())
    time.sleep(2)
    print("%s is done" % current_thread().getName())

if __name__ == "__main__":
    t1 = Thread(target=task,name="子线程") # 其中current_thread()就是拿到t1
    t1.start()
    t1.setName("son线程")
    print(t1.getName())
    current_thread().setName("主线程")
    print("主线程名字",current_thread().getName())

子线程 is running
son线程
主线程名字 主线程  # 名字修改成功
son线程 is done

查看存活

from threading import Thread, current_thread
import time

def task():
    print("%s is running" % current_thread().getName())
    time.sleep(2)
    print("%s is done" % current_thread().getName())

if __name__ == "__main__":
    t1 = Thread(target=task,name="子线程") # 其中current_thread()就是拿到t1
    t1.start()
    # t1.setName("son线程")
    # print(t1.getName())
    # current_thread().setName("主线程")
    print(t1.isAlive())
    print("主线程名字",current_thread().getName())

子线程 is running
True
主线程名字 MainThread
子线程 is done

等待

from threading import Thread, current_thread
import time

def task():
    print("%s is running" % current_thread().getName())
    time.sleep(2)
    print("%s is done" % current_thread().getName())

if __name__ == "__main__":
    t1 = Thread(target=task,name="子线程") # 其中current_thread()就是拿到t1
    t1.start()
    t1.join()
    # t1.setName("son线程")
    # print(t1.getName())
    # current_thread().setName("主线程")
    print(t1.isAlive())
    print("主线程名字",current_thread().getName())

子线程 is running
子线程 is done
False
主线程名字 MainThread

查看线程总数 activeCount

from threading import Thread, current_thread,activeCount
import time

def task():
    print("%s is running" % current_thread().getName())
    time.sleep(2)
    print("%s is done" % current_thread().getName())

if __name__ == "__main__":
    t1 = Thread(target=task,name="子线程") # 其中current_thread()就是拿到t1
    t1.start()
    # t1.setName("son线程")
    # print(t1.getName())
    # current_thread().setName("主线程")
    # print(t1.isAlive())
    # print("主线程名字",current_thread().getName())
    print(activeCount())

子线程 is running
2
子线程 is done

查看当前线程对象 enumerate

from threading import Thread, current_thread,activeCount,enumerate
import time

def task():
    print("%s is running" % current_thread().getName())
    time.sleep(2)
    print("%s is done" % current_thread().getName())

if __name__ == "__main__":
    t1 = Thread(target=task,name="子线程") # 其中current_thread()就是拿到t1
    t1.start()
    print(enumerate())

子线程 is running
[<Thread(子线程, started 8492)>, <_MainThread(MainThread, started 6932)>]
子线程 is done