The PyA (PyAstronomy) suite of astronomy-related packages includes a convenient fitting package that provides support for minimization and MCMC sampling, a set of astrophysical models (e.g., transit light-curve modeling), and algorithms for timing analysis such as the Lomb-Scargle and the Generalized Lomb-Scargle periodograms.
https://ui.adsabs.harvard.edu/abs/2019ascl.soft06010C and give a link to PyAstronomy (https://github.com/sczesla/PyAstronomy), e.g., as a footnote