Free Analysis and Visualization Programs for Electrochemical Impedance Spectroscopy Coded in Python

New programs for fitting using an equivalent circuit model and data visualization of electrochemical impedance spectroscopy were developed using Python and its open-source libraries. Executable programs have a graphical user interface and can run on a Microsoft Windows operating system without utilizing other platform applications. Many practical functions were implemented, e.g., supporting various file formats, graphical support functions to obtain a good initial guess, display interactive three-dimensional plots of the spectrum, a modified logarithmic Hilbert integral transform test, display multiple spectra data, etc. The developed executable programs were released by free of charge for use under the MIT license.