Phi_K correlation analyzer library

Phi_K is a practical correlation constant that works consistently between categorical, ordinal, and interval variables. It extends Pearson's hypothesis test of independence, capturing non-linear dependencies and reverting to Pearson's correlation for bi-variate normal distributions. The current version, 0.12.5, was released in July 2025. The library aims for a regular release cadence, with updates occurring every few months to a year, incorporating Python version support and bug fixes.