Deleting from a list of complicated objects

Removing items from a list has an interesting consequence. Specifically, when item list[x] is removed, all the subsequent items move forward. The rule is this:

Items list[y+1] take the place of items list[y] for all valid values of .

This is a side-effect that happens in addition to removing the selected item. Because things can move around in a list, it makes deleting more than one item at a time potentially challenging.

When the list contains items that have a definition for the __eq__() special method, then the list remove() method can remove each item. When the list items don't have a simple __eq__() test, then it becomes more challenging to remove multiple items from the list.

We'll look at ways to delete multiple items from a list when they are complicated objects like instances of the built-in dict collection or of a NamedTuple or dataclass.

Getting ready

In order to create a more complex data...