Ray tune AssertionError: HpBandSter must be installed! | Cannot run HyperBandForBOHB

Question

I try to use HyperBandForBOHB in ray tune, but I always get this error while all requirement has been installed:

AssertionError: HpBandSter must be installed!
            You can install HpBandSter with the command:
            `pip install hpbandster ConfigSpace`.

I uninstalled all related pkgs and install them (not from cache) from scratch, but the error still appears.

hpbandster version(0.7.4) ConfigSpace version(0.6.0) Ray version(2.1.0) Python version(3.8) Ubuntu 20.04

Answer 1

This was caused by

ImportError: cannot import name '_centered' from 'scipy.signal.signaltools'

And I solve it by

 pip install statsmodels --upgrade