Inlining comprehensions -- what are the compatibility constraints?

[carljm (Carl Meyer)]

@guido

in my experience the extra frame can be annoying when debugging with pdb – you can’t print local variables when you’re in the comprehension’s frame.

Just noticed there is a long-standing (and long-closed as “too hard to implement”) issue about this debugging annoyance: list comprehensions don't see local variables in pdb in python3 · Issue #65360 · python/cpython · GitHub