Method decr

src/12/how_to_lock_critical_sections/example1.py:18–23

Decrement the counter with locking

(self,delta=1)

             self._value += delta

    def decr(self,delta=1):
        '''
        Decrement the counter with locking
        '''
        with self._value_lock:
             self._value -= delta

def test(c):
    for n in range(1000000):