How to get the picture when I use Python in Power BI?

I have plotted several points and curves in the picture, and now I want to relize draw one point in the picture by my mouse, but I can't relize it.

I open the Python Scripts Editor in Pycharm（one of Python Compilers）, and find matplotlib.use('Agg'), this make my development needs cann't be achieved.

I searched for some answers in Internet, and i knew I can operate the picture（in Opencv）to relize the needs of draw one dot by mouse, but at the end of the Python scripts, the picture will be saved in a randomly named folder, I cann't get detailed file path before I open the Python scripts editor.

Thanks anyone who can help me.