pandas merge rows code example

Example 1: combining 2 dataframes pandas

df_3 = pd.concat([df_1, df_2])

Example 2: merge on row number python

pd.concat([T1,T2],axis=1)

Example 3: how to merge two pandas dataframes on a column

import pandas as pd
T1 = pd.merge(T1, T2, on=T1.index, how='outer')

Example 4: how to merge rows in pandas dataframe

df = dataframe.groupby(['date', 'sitename', 'name']).sum()