A typed dictionary in Python with case-insensitive keys.
pip install caseless
from caseless import CaselessDict
CaselessDict({"lower": "UPPER"})["LOWER"] == "UPPER"
CaselessDict({"lower": "UPPER"}).get("LOWER") == "UPPER"
CaselessDict({"lower": "value"}) == CaselessDict({"LOWER": "value"})