Documentation

I always assumed thatunittest.mock.patch.dict made a recursive (deep) copy of the dict and restored it afterwards.
It turns out it is a "simple" copy()

We should maybe clarify that in the documentation

Example:

foo= {"bar": {"baz":1}}withpatch.dict(foo, {"unrelated":123}):foo["bar"]["baz"]=2# baz will stay at 2, assumed it was reset to the original 1

Linked PRs

• gh-144433: clarify patch.dict behavior #144434