matplotlib - How to do a scatter plot with empty circles in Python? - Stack Overflow
Python Lesson Data Science Matplotlib Markers 'o' Circle, '*' Star, '.' Point, ',' Pixel, 'x' X, The Markers Are Keyword Argument Used to Emphasize Each Point With Specified MarkerFind The Available Options
How to Plot Circles in Matplotlib (With Examples) - Statology
Draw Circle — Diameter, Radius, Arc and Segment Using Python Matplotlib Module | by Nutan | Medium