The spinners are in https://pypi.python.org/pypi/spinners / https://github.com/ManrajGrover/py-spinners
Which is a port of https://github.com/sindresorhus/cli-spinners
I spoke to @sindresorhus on Twitter and he was okay with me porting the libraries to Python (https://twitter.com/manrajsgrover/status/904396978531983360).
The spinners are in https://pypi.python.org/pypi/spinners / https://github.com/ManrajGrover/py-spinners
Which is a port of https://github.com/sindresorhus/cli-spinners