To append multiple Python Pandas data frames at once, we can use the append method.

For instance, we write

import numpy as np
import pandas as pd

dates = np.asarray(pd.date_range('1/1/2000', periods=8))
df1 = pd.DataFrame(np.random.randn(8, 4), index=dates, columns=['A', 'B', 'C', 'D'])
df2 = df1.copy()
df3 = df1.copy()
df = df1.append([df2, df3])

to create 2 data frames df1 and df2.

And then we make copied of them with copy.

Finally, we call append with a list with df1 and df2 in it.