suggestion and autocompletion of magic (dunder) methods

[Badr-MOUFAD]

It would be nice to have suggestions for additional magic methods as well as their auto-completion.

For example, defining methods such as __len__, __getitem__, and __setitem__ are useful when creating special data structures that behave as a list.

[judej]

Moving this issue to discussion as an enhancement request for comments and upvotes.