python大数据初探--pandas,numpy代码示例

import pandas as pd
import numpy as np 
dates = pd.date_range('20180525',periods=6)
dates

import pandas as pd
import numpy as np 
dates = pd.date_range('20180525',periods=6)
mytbl = pd.DataFrame(np.random.randn(6,4),index=dates,columns=list('ABCD'))
mytbl

mytbl.sort_values(by='B')