details.rst

If you rely on a pattern like:

if guarded():
    var = 1

if guarded():
    print(var)  # emits possibly-used-before-assignment

you may be concerned that possibly-used-before-assignment is not totally useful in this instance. However, consider that pylint, as a static analysis tool, does not know if guarded() is deterministic or talks to a database. (Likewise, for guarded instead of guarded(), any other part of your program may have changed its value in the meantime.)