Reconstruct. This could only be applied if you have only one dtype for all columns. If not, you can expect to end up getting dtype object for all columns and changing them back necessitates additional dictionary operate. But there are other tips on how to say precisely the same thing; https://stack-ball-colorful-tower03436.dbblog.net/9715750/5-easy-facts-about-stack-ball-game-for-kids-described