【Python代码】数据排序

1…sort_index()方法在指定轴上根据索引进行排序，默认升序
.sort_index(axis=0,ascending=True)

import pandas as pd
import numpy as np
b = pd.DataFrame(np.arange(20).reshape(4,5), index=['c','a', 'd', 'b'])
b

2…sort_index(axis=0,ascending=True)

import pandas as pd
import numpy as np
b = pd.DataFrame(np.arange(20).reshape(4,5), index = ['c', 'a', 'd', 'b'])
b

3…sort_values(by, axis=0, ascending=R=True)