Method _whats_different

lib/sqlalchemy/sql/cache_key.py:485–513

(self, other: CacheKey)

        return ck1._diff(ck2)

    def _whats_different(self, other: CacheKey) -> Iterator[str]:
        k1 = self.key
        k2 = other.key

        stack: List[int] = []
        pickup_index = 0
        while True:
            s1, s2 = k1, k2
            for idx in stack:
                s1 = s1[idx]
                s2 = s2[idx]

            for idx, (e1, e2) in enumerate(zip_longest(s1, s2)):
                if idx < pickup_index:
                    continue
                if e1 != e2:
                    if isinstance(e1, tuple) and isinstance(e2, tuple):
                        stack.append(idx)
                        break
                    else:
                        yield "key%s[%d]:  %s != %s" % (
                            "".join("[%d]" % id_ for id_ in stack),
                            idx,
                            e1,
                            e2,
                        )
            else:
                stack.pop(-1)
                break

    def _diff(self, other: CacheKey) -> str:
        return ", ".join(self._whats_different(other))