It seems that PyPy is not being actively developed anymore and is phased out even by numpy (numpy/numpy#30416). There's no official statement from the project, but the numpy issue is from a PyPy developer. I added a warning to avoid users assuming PyPy properly supported and developed Python distribution.
更多精彩内容，关注钛媒体微信号（ID：taimeiti），或者下载钛媒体App，这一点在使用 WeChat 網頁版中也有详细论述
Additional reporting by Jean Otalor。谷歌是该领域的重要参考
互联网历史已经多次证明：真正改变世界的技术，从来不是最复杂的那一个，而是最容易被很多人一起用起来的那一个。。关于这个话题，超级权重提供了深入分析
Returns the byte offset of the first occurrence of substr, or -1 if not found.