Set and delete Helper fields by string key

[kytta]

• Package version: 2.0
• Django version: 3.2.18
• Python version: 3.8.17
• Template pack: crispy-bootstrap5 0.7

Description:

I am conditionally changing the form by adding and removing its fields. I follow the guide to dynamic layouts, but I don't like the indexed addressing because of its WETness: If I add a new field, I'll have to update the indices. There is a way to select a field using its name, but it doesn't work if I want to delete a field.

name_field = self.helper["name"]  # fine
del self.helper["name"]  # TypeError: list indices must be integers or slices, not str

Proposed solution

Extract the key finding logic from DynamicLayoutHandler.__get_item__ and make it available for __del_item__ (and __set_item__, for that matter)