import threading class SharedCounter: def __init__(self): self. value \\( =0 \\) self._value_lock \\( = \\) threading. \\( \\operatorname{Lock}( \\) ) def increment (self, delta=1): with self._value_lock: self.value \\( += \\) delta def get_value(self): with self._valar_lock: return self.value def worker(counter, num_iters): for _ in range (num_iters): counter.increment () if __name__ == "__main__" : counter \\( = \\) SharedCounter ()