[GitHub] squidszyd opened a new issue #12138: How to debug C++ Iterator?

[GitBox <gi...@apache.org>]

squidszyd opened a new issue #12138: How to debug C++ Iterator?
URL: https://github.com/apache/incubator-mxnet/issues/12138
 
 
   I've written a C++ iterator (name it `MyIterator`) for performance purpose. The implementation (.cc) file is put in `src/io`. After `make`, I found myself only able to call it through python interface using `iter = mx.io.MyIterator` and hard to access the C++ code and debug.
   
   For instance, `MyIterator` provides multiple labels (suppose the number is 4) as label data in one sample, which is different from iterators like `ImageRecordIter` which only provides only a classification label. However, when I check the output of `databatch = iter.next()`, I found that the returned `databatch` is incomplete. `databatch.label`  should have 4 labels per instance, but in fact only the first one of the four is provided.
   
   Could someone help me with this?

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