python - Why "CopyFrom" is used during the creation of the constant Tensor? -

during creation process of constant tensor there following line:

  tensor_value.tensor.copyfrom(       tensor_util.make_tensor_proto(value, dtype=dtype, shape=shape)) 

copyfrom creates copy of newly created tensor proto. looks waste of resource coping since make_tensor_proto, according doc, creates new object. more sufficient, next:

  tensor_value.tensor =       tensor_util.make_tensor_proto(value, dtype=dtype, shape=shape) 

this should not create new object, plus valid usage of oneof protobuf fields.

you cannot assign proto field of proto explained in doc: https://developers.google.com/protocol-buffers/docs/reference/python-generated

you cannot assign value embedded message field. instead, assigning value field within child message implies setting message field in parent.

if remove copyfrom, following error:

attributeerror: assignment not allowed field "tensor" in protocol message object.