Welcome to SJTU CS1001, Introduction to Computer Science and Programming, taught by Shengan Zheng.

Pyscript: an html with embedded pyscript (pyscript.net).
Example: pyscript.html?py=area&ch=2

Pytutor: an html with embedded pytutor (pythontutor.com/visualize.html#mode=edit).
Example: pytutor.html?py=area&ch=2