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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 clear(self):
 """Return the mean estimate and reset the streaming statistics."""

    value = self._sum / tf.cast(self._count, self._dtype)
    with tf.control_dependencies([value]):
      reset_value = self._sum.assign(tf.zeros_like(self._sum))
      reset_count = self._count.assign(0)
    with tf.control_dependencies([reset_value, reset_count]):
      return tf.identity(value)