Hi Ronnakrit,
I think the best bet might be to wait until pyGPlates supports Anaconda (as you said). The next pyGPlates release should support Anaconda, but we don’t have an estimate on the release date yet. There’s some info in this thread regarding compiling pyGPlates for Anaconda if you’re interested, but it get pretty technical.
I recall one user trying pyGPlates on Google Colab. Apparently the Colab instance was using Ubuntu 18.04. But ran into the following issue…
What you tried (with sys.path) would work for a pure Python package. However pyGPlates is a C extension, so this is unlikely to work (you’d need pre-compiled dependency libraries, required by pyGPlates, that are suitable for the Colab instance OS version, and even then I’m not sure if it’d work). Anaconda will be the recommendation for these scenarios in the (near-ish) future.