Method incr

src/12/how_to_lock_critical_sections/example1.py:11–16

Increment the counter with locking

(self,delta=1)

        self._value_lock = threading.Lock()

    def incr(self,delta=1):
        '''
	Increment the counter with locking
	'''
        with self._value_lock:
             self._value += delta

    def decr(self,delta=1):
        '''