For administrative reasons, pycold is no longer maintained.
You should switch to the new-generation cross-platform (Windows, Linux, MacOS) package pyxccd, which incorporates the latest updates on CCDC and its extension algorithms.
To use the new package, you could directly install it in pip:
pip install pyxccdPlease contact Su Ye (remotesensingsuy@gmail.com) if you have any problem for this package.