Some of these features are very new, and depend on the new parser that came with 3.9.
Actual proper IANA time zone support
|= (in-place), works on most dictionary-like types (defaultdict, lists of 2-tuples, etc.)
.stripdoes weird, unexpected stuff
"new cool features in Python".strip(" in Python")->
"ew cool features"
"new cool features in Python".removesuffix(" Python")