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一 pandas DataFrame一列赋值问题说明，把的b列赋值给a情况1：a,b index设置相同如下代码import pandas as pdimport numpy as npa = pd.DataFrame(np.arange(16).reshape(4,4),index=list('abcd'),columns=list('wxyz'))b = pd.DataFrame(np....

如下代码，column a为0的index 为1 行号为0     a   b   c1   0   2  42   1   3  5import pandas as pdimport numpy as npdata_frame = pd.DataFrame({'a':[0,1],'b':[2,3],'c':[4,5]})data_frame.index = [1,2]...