df2 = pd.DataFrame(columns=['A', 'B', 'C'], index=index)
df2.loc[0:1] = [list(s1), list(s2)]
df2
df2 = pd.DataFrame(columns=['A', 'B', 'C'], index=index)
df2.loc[1:] = [list(s1), list(s2)]
Insert a row to pandas dataframe