_k2

If you have used PyTorch, you have probably seen torch._C

>>> import torch
>>> import torch._C
>>> print(torch._C.__file__)
/star-fj/fangjun/py38/lib/python3.8/site-packages/torch/_C.cpython-38-x86_64-linux-gnu.so

Similarly, we have _k2 in k2:

>>> import torch
>>> import _k2
>>> print(_k2.__file__)
/root/fangjun/open-source/k2/build-cpu-debug/lib/_k2.cpython-38-x86_64-linux-gnu.so

You can see that both _C and _k2 are contained in a shared library because they are implemented in C++.

Hint

In case you are interested in how to wrap C++ code to Python, please have a look at pybind11.

• How to debug _k2
  • Code with bugs
  • Error logs of the buggy code
  • Ways to debug
  • Summary