python锁定焦点到输入框 python加锁

__author__ = 'alex'

import threading
import time

x = 10

def fun(l):
    global x
    l.acquire()
    x -= 1
    time.sleep(2)
    print (x)
    l.release()

lock = threading.RLock()

for i in range(10):
    tt = threading.Thread(target=fun,args=(lock,))
    tt.start()

执行结果：
9
8
7
6
5
4
3
2
1
0

 通过threading.Event()加锁，Event()会将锁之前的操作完全的锁住，Event.set()之后，就完全释放通过：

__author__ = 'alex'

import threading

def func(i,e):
    print (i)
    e.wait()
    print (i+100)

event = threading.Event()

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

event.clear()
inp = input(">>>>")
if inp == '1':
    event.set()

执行结果：
0
1
2
3
4
5
6
7
8
9
>>>>1
102
103
106
107
100
101
104
105
108
109

 Condition锁：

__author__ = 'alex'
import threading

def run(i,conn):
    print (i)
    conn.acquire()
    conn.wait()
    print (i+100)
    conn.release()

c = threading.Condition()

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

while True:
    inp = input(">>>>>")
    if inp == 'q':
        break
    else:
        c.acquire()
        c.notify(int(inp))
        c.release()

执行结果：
0
1
2
3
4
5
6
7
8
9
>>>>>1
>>>>>100
2
>>>>>101
102
3
>>>>>105
103
104
4
>>>>>107
108
106
109
5
>>>>>5
>>>>>5
>>>>>5

 用wait_for实现满足条件的时候执行一个线程

import threading

def condition():
    ret = False
    r = input(">>>>")
    if r == 'true':
        ret = True
    else:
        ret = False
    return ret

def run(i,conn):
    print (i)
    conn.acquire()
    conn.wait_for(condition)
    print (i+100)
    conn.release()

c = threading.Condition()

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

执行结果：
0
>>>>1
2
3
4
5
6
7
8
9
t
>>>>t
>>>>t
>>>>t
>>>>t
>>>>False
>>>>true
106
>>>>true
107