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()