Re: [code-quality] Warn on list comprehension variables used outside list comprehensions?

That's not the point of this check. The point of this check is that on Python 2, the binding to x in the comprehension bleeds outside of the comprehension scope

Got it. Still, this code:

x = 10 [x for x in range(3)] print(x + 1)

will run differently in Python 2 than Python3, so even if that was a conscious choice by the author, a --py3k flag should cause a message for this code. This is even worse than the simpler

[x for x in range(3)] print(x + 1)

because at least that will raise a NameError when run in Python 3. The three-line construct will still run, though produce different output. Skip