I started to touch the pygwinc package for KAGRA's configuration. In 2019, the codes were converted from matlab to python 2 and uploaded at JGWdoc.

I edited these codes to run on python 3.

1. Use `2to3` to convert python2 code to python3 code. 
2. Depending on the scipy version, I needed to add `import scipy.constants` in precomp.py

I confirmed that these codes can generate the KAGRA's theoretical noise curves . In future, I hope these noise curve can be tuned on the Pastav and includd in the noise budget. The detailed check and updates are planed by Komori-san.