dataframe merge example

Example 1: pandas merge python

import pandas as pd
df1 = pd.DataFrame({'lkey': ['foo', 'bar', 'baz', 'foo'],
                    'value': [1, 2, 3, 5]})
df2 = pd.DataFrame({'rkey': ['foo', 'bar', 'baz', 'foo'],
                    'value': [5, 6, 7, 8]})
df1.merge(df2, left_on='lkey', right_on='rkey')

Example 2: merge two df

bigdata = pd.concat([data1, data2], ignore_index=True, sort=False)

Example 3: merge dataframe

In [46]: result = pd.merge(left, right, how="right", on=["key1", "key2"])