Comprehensions are currently compiled as nested functions, which provides isolation of the comprehension’s iteration variable, but is inefficient at runtime. This PEP proposes to inline list, dictionary, and set comprehensions into the code where they are defined, and provide the expected isolation by pushing/popping clashing locals on the stack.
Last: F Strings will support some common use cases that broke interpolation in the past, like f'{ myDict['myKey'] }' and f"{'n'.join(a)}"
Asking for specific #examples type checking finds is ... unproductive. You write 2 modules of code, run #mypy, and get a list of the 11 places you need to fix - before you've even written unit tests that may or may not have caught the same problem.
If I tried to keep track of them all, I wouldn't have time to write code.