weighted_sampling_reader

[weidezhang]

one question I want to ask is why the weighted sampling reader requires all reader have the exact same schema ? Can we modify it so that each reader have different schemas ?

[weidezhang]

say i want to have a reader A contains schema (a,b,c) while another reader B schema contains (a,b,c,d). Can they both be sampled together ? The extra field in B will be used on extra loss function defined in the network.

[selitvin]

It was design that way to support old TF reading style : the schema must have been known in advance to hook the reader into TF graph. This might not be necessary when not reading from TF. If you'd like to propose a PR, I would be happy to take a look.

[weidezhang]

thx for the confirmation. we will propose a PR later.