计算geohash附近8平方的最佳方法？

Question

我已经看到它们是pyton中用来计算geohash的一些lib

但也有一些局限性：

https://en.wikipedia.org/wiki/Geohash

This will retrieve all points in the z-order curve between the two corners, which can be far too many points, this also breaks down at the 180 meridians and the poles. Solr uses a filter list of prefixes, by computing the prefixes of the nearest squares close to the geohash

那么，在python中计算最近正方形前缀的最佳方法是什么

目前，我正在通过计算两点之间的公里数来计算距离