import pandas as pd

import numpy as np

def main():

? ? s=pd.Series([i*2 for i in range(1,11)])

? ? print(type(s))

? ? dates=pd.date_range('20180330',periods=8)

? ? df=pd.DataFrame(np.random.randn(8,5),index=dates,columns=list('ABCDE'))

? ? print(df)

? ??

if __name__=="__main__":

? ? main()