ｘ３３ - 経済統計練習帳

import pandas as pd
import numpy as np
 
df = pd.DataFrame({'one' : pd.Series(np.random.randn(3), index=['a', 'b', 'c']),
                   'two' : pd.Series(np.random.randn(4), index=['a', 'b', 'c', 'd']),
                   'three' : pd.Series(np.random.randn(3), index=['b', 'c', 'd'])})
 
print(df)