Python中pandas的DataFrame按特定的list顺序排序—reindex函数 ﹏ヽ暗。殇╰゛Y 2022-06-02 03:45 180阅读 0赞 如果一个DataFrame的index乱了，按正常的sort\_index无法排序，则可以用reindex函数 import numpy as np import pandas as pd >>> randWeek=['Tues','Thur','Mon','Sat','Fri','Sun','Wed'] >>> frame=pd.DataFrame(np.random.randn(7,3),columns=list('abc'),index=randWeek) >>> frame a b c Tues 0.054086 -2.546081 0.051492 Thur 0.232368 -0.937215 0.883313 Mon -1.004652 1.266954 0.321374 Sat 2.003404 0.514108 0.640477 Fri -0.631527 0.939361 -0.013297 Sun 0.492959 -0.171945 0.030827 Wed -0.334522 -0.334029 0.575805 >>> normalWeek=['Mon','Tues','Wed','Thur','Fri','Sat','Sun'] >>> frame.reindex(normalWeek) a b c Mon -1.004652 1.266954 0.321374 Tues 0.054086 -2.546081 0.051492 Wed -0.334522 -0.334029 0.575805 Thur 0.232368 -0.937215 0.883313 Fri -0.631527 0.939361 -0.013297 Sat 2.003404 0.514108 0.640477 Sun 0.492959 -0.171945 0.030827 指定的list中的index可以比DataFrame中已有的index多或少 >>> otherWeek1=['Tues','Wed','Thur','Fri','Sat','Sun'] >>> frame.reindex(otherWeek1) a b c Tues 0.054086 -2.546081 0.051492 Wed -0.334522 -0.334029 0.575805 Thur 0.232368 -0.937215 0.883313 Fri -0.631527 0.939361 -0.013297 Sat 2.003404 0.514108 0.640477 Sun 0.492959 -0.171945 0.030827 >>> otherWeek2=['Mon','Tues','Wed','Thur','Fri','Sat','Sun','lalala'] >>> frame.reindex(otherWeek2) a b c Mon -1.004652 1.266954 0.321374 Tues 0.054086 -2.546081 0.051492 Wed -0.334522 -0.334029 0.575805 Thur 0.232368 -0.937215 0.883313 Fri -0.631527 0.939361 -0.013297 Sat 2.003404 0.514108 0.640477 Sun 0.492959 -0.171945 0.030827 lalala NaN NaN NaN 人生苦短，我用python~
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