Python: Thread, multi-thread lock, multi-threaded recursive locks

#!usr/bin/env python
#-*-Coding:utf-8-*-

__author__ = "Samson"

Import Threading,time
def run (N):
    Print ("task", N)
    Time.sleep (2)
    Print ("Current thread:", Threading.current_thread ()) #当前线程

T_obj = [] #存线程实例
Start_time = Time.time ()
For I in range (50):
    t = Threading. Thread (target=run,args= ("t%s"%i,))
    #t. Setdaemon (True) #把当前线程设置为守护线程, must be set before T.start () to function as the main thread will not wait for the child thread to end
    T.start ()
    T_obj.append (t)
Print ("Total thread:", Threading.active_count ()) #总线程数
For T in T_obj:
    T.join () #等待线程执行完
Print ("%s"% (ABS (Start_time-time.time ())))

Multi-threaded lock

#!usr/bin/env python
#-*-Coding:utf-8-*-

__author__ = "Samson"

Import Threading,time
def run (N):
    Lock.acquire () #锁上
    Global num
    num + = 1
    #time. Sleep (1) #会变为单线程
    Lock.release () #解锁
Lock = Threading. Lock () #创建锁
num = 0
T_obj = [] #存线程实例
For I in range (50):
    t = Threading. Thread (target=run,args= ("t%s"%i,))
    T.start ()
    T_obj.append (t)
For T in T_obj:
    T.join ()
Print ("%s"%num)

Multi-threaded recursive lock

#!usr/bin/env python
#-*-Coding:utf-8-*-

__author__ = "Samson"

Import Threading,time
def run ():
    Lock.acquire () #锁上
    res = RUN1 ()
    Res2 = Run2 ()
    Lock.release () #解锁
Def run1 ():
    Lock.acquire () #锁上
    Global num
    num + = 1
    Lock.release () #解锁
Def run2 ():
    Lock.acquire () #锁上
    Global num
    num + = 1
    Lock.release () #解锁
Lock = Threading. Rlock () #创建递归锁
num = 0
For I in range (10):
    t = Threading. Thread (Target=run)
    T.start ()
Print ("Now:", Threading.active_count ())
While Threading.active_count ()! = 1:
    Print (Threading.active_count ())
Else
    Print ("%s"%num)

Python: Thread, multi-thread lock, multi-threaded recursive locks