superset: source code reading

import inspect 
# The base class of all charts
 import BaseViz
 
# Global variables globals () All information in the current file, dictionary type; contains classes, variables. . . 
# Get the viz_type attribute of all class objects in the current file

viz_line_list = { o.viz_type: o for o in globals().values() if (inspect.isclass(o) and issubclass(o, BaseViz))}

• inspect package
• Subclass determination method