can't detect GPU

[turmeric-blend]

Problem description

WARNING:absl:No GPU/TPU found, falling back to CPU. (Set TF_CPP_MIN_LOG_LEVEL=0 and rerun for more info.)

Example

my_portfolio = rp.RiskParityPortfolio(covariance=sigma, budget=b)
my_portfolio.design()

Expected behavior

Is there a way to allow it to detech GPU?

Environment:

• platform (e.g. Linux, OSX, Windows): Ubuntu 18.04
• riskparityportfolio version (e.g. 1.1): 0.2
• installation method (e.g. pip, source): pip