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import pandas as pd
col = ['c1','c2']
df0 = pd.DataFrame([],index=[],columns=col)
df0.at['r1','c3']=45
print(df0)
df1 = pd.DataFrame({'A': ['A0', 'A1', 'A2'],
'B': ['B0', 'B1', 'B2'],
'C': ['C0', 'C1', 'C2'],
'D': ['D0', 'D1', 'D2']},
index=[0, 1, 2])
print(df1)
df2 = pd.DataFrame({'A': 'A3',
'B': 'B3',
'C': 'C3',
'D': 'D3'},
index=[3])
df1 = df1._append(df2)
print(df1)
df3 = pd.DataFrame({'A': 'A4',
'B': 'B4',
'C': 'C4',
'D': 'D4'},
index=[4])
df2 = df2._append([df1, df3])
print(df2) |
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