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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _write_lock(self):
 """Acquire and release the lock around output calls. This should allow multiple threads or processes to write output reliably. Code that modifies the `_content` attribute should also do so within this context. """

        if self._lock:
            lgr.debug("Acquiring write lock")
            self._lock.acquire()
        try:
            yield
        finally:
            if self._lock:
                lgr.debug("Releasing write lock")
                self._lock.release()