importthreadingimporttimeclassAddThread():def__init__(self, start=0): self.lock = threading.Lock() self.value = startdefincrement(self):print("Wait Lock")withself.lock:print("lock acquire") self.value +=1print(self.value)print("lock release")defworker(a): time.sleep(1) a.increment()...
importthreadingfromthreadingimportThread, LockimporttimeclassCounter:def__init__(self): self._val=0 self.__lock=Lock() @propertydefvalue(self): with self.__lock:returnself._valdefinc(self):try: self.__lock.acquire() self._val+= 1finally: self.__lock.release()defdec(self): with self....
def __init__(self, initial_value = 0): self._value = initial_value self._lock = threading.Lock() def incr(self,delta=1): ''' 加库存 ''' with self._lock: self._value += delta def decr(self,delta=1): ''' 减库存 ''' with self._lock: self.incr(-delta) 我们关注一下上面...
print('coro {}: waiting for lock'.format(name)) async with lock: print('coro {}: holding the lock'.format(name)) await asyncio.sleep(1) print('coro {}: releasing the lock'.format(name)) loop = asyncio.get_event_loop() lock = asyncio.Lock() coros = asyncio.gather(coro(1, lock...
def work(data, lock): # 1.正常写法 """ # 上锁 lock.acquire() # 修改数据 data["count"] -= 1 # 解锁 lock.release() """ # 2.使用with语法可以简化上锁和解锁两步操作 with lock: data[0] += 1 if __name__ == '__main__': ...
with counter_lock: counter += 1 def main(): thread1 = threading.Thread(target=increment_counter) thread2 = threading.Thread(target=increment_counter) thread1.start() thread2.start() thread1.join() thread2.join() print("Counter:", counter) ...
'comments': comments, } with self.lock: # print 'write %s' % json.dumps(result) self.f.write(json.dumps(result, ensure_ascii=False).encode('utf-8') + "\n") except Exception, e: print 'site in result', e except Exception, e: print 'parse_data', e with self.lock: total +=...
1、Lock() 同步锁 基本介绍 Lock锁的称呼有很多,如: 同步锁 互斥锁 它们是什么意思呢?如下所示: 互斥指的是某一资源同一时刻仅能有一个访问者对其进行访问,具有唯一性和排他性,但是互斥无法限制访问者对资源的访问顺序,即访问是无序的 同步是指在互斥的基础上(大多数情况),通过其他机制实现访问者对资源的有...
with lock 前文,我们通过lock.acquire()与lock.release()实现了锁的获取与释放,但其实我们Python还给我们提供了一个更简单的语法,通过with lock来获取与释放锁。 示例如下: 代码语言:javascript 代码运行次数:0 复制 Cloud Studio代码运行 importthreadingimporttimeclassAddThread():def__init__(self,start=0):sel...
self.lock=threading.Lock()defallocate(self,request):withself.lock:ifself.available_resources>=request:print(f"Allocated{request}resources.")self.available_resources-=requestelse:print("Insufficient resources.")defrelease(self,release):withself.lock:self.available_resources+=releaseprint(f"Released{releas...