There are very very very lots of mistakes in your code, i'm very sorry about that

[sheldon606]

If you try to fix one bug, it appears another one. There are lots of mistakes in your project.

[sheldon606]

for example

File "build/bdist.linux-x86_64/egg/gluoncv/model_zoo/rpn/anchor.py", line 96, in hybrid_forward
AttributeError: 'module' object has no attribute 'slice_like'

[lininglouis]

@sheldon606 try to compile the latest mxnet 1.3.x version. Some of those features are not supported in the earlier mxnet version. Lots of faults are because of the version mismatch.
When you raise a question, please mention what command you use. It would be helpful to reproduce the error if it exists, and identify the bug on our own PC.