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import pandas as pd
import numpy as np
a = pd.Series(data=[1,2,3], index=[4,5,6], dtype=np.int8)
a.name = 'lol'
b = pd.Series(data=[10,20,30], index=[5,6,7], dtype=np.int8)
df = pd.concat([a,b], axis=1).T.fillna(0).astype(np.int8)
print(a)
print(df)
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