一窜司、線程基本

• start 線程準備就緒，等待CPU調(diào)度

• setName 為線程設置名稱
• getName 獲取線程名稱
• setDaemon 守護線程
• join 逐個執(zhí)行每個線程啤它，執(zhí)行完畢后繼續(xù)往下執(zhí)行，該方法使得多線程變得無意義
• run 線程被cpu調(diào)度后自動執(zhí)行線程對象的run方法

import threading
import time

def foo(num):
    print('{} is runing \n'.format(num))
    time.sleep(3)
    print('{} is accomplish \n'.format(num))

t1 = threading.Thread(target=foo, args=(1,))            #創(chuàng)建線程，注意逗號
t2 = threading.Thread(target=foo, args=(2,))

t1.start()
t2.start()
print(t1.getName())
print(t2.getName())
t1.join()            #確保線程完成
t2.join()

print('Done')
>>> 
================== RESTART: C:\Users\Why Me\Desktop\線程基本.py ==================
1 is runing 
Thread-12 is runing 



Thread-2
2 is accomplish 
1 is accomplish 


Done

二钩蚊、創(chuàng)建多個線程

import threading
import time

def foo(num):
    print('{} is runing \n'.format(num))
    time.sleep(3)
    print('{} is accomplish \n'.format(num))
a = []
for i in range(10):
    t = threading.Thread(target=foo, args=[i,])
    t.start()
    a.append(t)
    print(t.getName())
for i in a:
    i.join()
print('Done')

================= RESTART: C:\Users\Why Me\Desktop\創(chuàng)建多個線程.py =================
Thread-10 is runing 


1 is runing 
Thread-2

2 is runing 
Thread-3

3 is runing 
Thread-4

Thread-54 is runing 


5 is runing 
Thread-6

6 is runing 
Thread-7

7 is runing 
Thread-8

8 is runing 
Thread-9

9 is runing 
Thread-10

0 is accomplish 
1 is accomplish 
2 is accomplish 

3 is accomplish 

4 is accomplish 
5 is accomplish 

6 is accomplish 
7 is accomplish 
8 is accomplish 

9 is accomplish 






Done

三川蒙、自己寫繼承線程類

import threading
import time

def foo(num):
    print('{} is runing \n'.format(num))
    time.sleep(3)
    print('{} is accomplish \n'.format(num))

class MyThread(threading.Thread):
    def __init__(self, num):
        super(MyThread,self).__init__()                  #新式繼承父類__init__
        #threading.Thread.__init__(self)                 #舊式繼承父類__init__
        self.num = num

    def run(self):
        print('{} is runing \n'.format(self.num))
        time.sleep(3)
        print('{} is accomplish \n'.format(self.num))

t1 = MyThread(1)
t2 = MyThread(2)
t1.start()
t2.start()

================ RESTART: C:\Users\Why Me\Desktop\自己寫繼承線程類.py ================
>>> 1 is runing 
2 is runing 


1 is accomplish 
2 is accomplish 

另：

• Lock蚜厉、RLock 線程鎖

• Semaphore 信號量 同時允許一定數(shù)量的線程更改數(shù)據(jù)
• event 事件 用于主線程控制其他線程的執(zhí)行 set、wait畜眨、clear
• condition 使得線程等待昼牛，只有滿足某條件時，才釋放n個線程
• Timer 定時器康聂，指定n秒后執(zhí)行某操作

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