docs: def constant(cls,
              value: Value,
              dtype: tf.DType = tf.float32) -> 'TensorFluent':
          '''Returns a constant `value` TensorFluent with given `dtype`.
  
          Args:
              value: The constant value.
              dtype: The output's data type.
  
          Returns:
              A constant TensorFluent.
          '''
          t = tf.constant(value, dtype=dtype)
          scope = [] # type: List
          batch = False
          return TensorFluent(t, scope, batch=batch)