apply(), applymap(), map() python里的apply,applymap和map的区别

Pandas 中map, applymap and apply的区别

  https://blog.csdn.net/u010814042/article/details/76401133/

Pandas中的map(), apply()和applymap()的应用

  https://blog.csdn.net/maymay_/article/details/80229053

python里的apply,applymap和map的区别

https://www.cnblogs.com/cymwill/p/7577369.html