Args and Returns in docstring

I'm using Pycco for my project to generate the API documentation. An example code snippet would be as following:

https://github.com/swghosh/ml-tour/blob/fcbfcf430a8924cff05c2078442912685d361199/ml_tour/kmeans.py

The documentation is generated fine but the
```
"""
Args:

Returns:

"""
```
section of all docstrings is completely ignored. How do we fix this?
