Lock python note 32

1, lock lock

import threading
import time

v = []
lock = threading.Lock()

def func(arg):
    lock.acquire()
    v.append(arg)
    time.sleep(0.01)
    m = v[-1]
    print(arg,m)
    lock.release()


for i in range(10):
    t =threading.Thread(target=func,args=(i,))
    t.start()

2, rlock lock

import threading
import time

v = []
lock = threading.RLock()
def func(arg):
    lock.acquire()
    lock.acquire()

    v.append(arg)
    time.sleep(0.01)
    m = v[-1]
    print(arg,m)

    lock.release()
    lock.release()


for i in range(10):
    t =threading.Thread(target=func,args=(i,))
    t.start()

3, semaphore lock

import time
import threading

lock = threading.BoundedSemaphore(3)
def func(arg):
    lock.acquire()
    print(arg)
    time.sleep(1)
    lock.release()


for i in range(20):
    t =threading.Thread(target=func,args=(i,))
    t.start()

4, condition locks

import time
import threading

lock = threading.Condition()

# ############## 方式一 ##############

def func(arg):
    print('线程进来了')
    lock.acquire()
    lock.wait() # 加锁

    print(arg)
    time.sleep(1)

    lock.release()


for i in range(10):
    t =threading.Thread(target=func,args=(i,))
    t.start()

while True:
    inp = int(input('>>> ' )) 

    lock.acquire () 
    lock.notify (InP) 
    lock.release () 


# ############## embodiment two ########### ### 
"" " 
DEF xxxx (): 
    Print ( 'to perform a function') 
    the INPUT (" >>> ") 
    # threading.current_thread CT = () # get the current thread 
    # ct.getName () 
    return True 

DEF FUNC (Arg): 
    Print ( 'thread came') 
    lock.wait_for (XXXX) 
    Print (Arg) 
    the time.sleep (. 1) 

for I in Range (10): 
    T = of the threading.Thread (target = FUNC, args = (I ,)) 
    t.start () 

"" "

5, event lock

Import Time
 Import Threading 

Lock = threading.Event () 

DEF FUNC (Arg):
     Print ( ' thread a ' ) 
    lock.wait () # lock: Red 
    Print (Arg) 

for I in Range (10 ): 
    T = of the threading.Thread (target = FUNC, args = (I,)) 
    t.start () 

INPUT ( " >>>> " ) 
lock.set () # green 

lock.clear () # again becomes red 

for I in Range (10  ):
    t=threading.Thread(target=func,args=(i,))
    t.start()

input(">>>>")
lock.set()