how to join tables in pandas code example

Example 1: pandas left join

df.merge(df2, left_on = "doc_id", right_on = "doc_num", how = "left")

Example 2: join tables pandas

In [99]: result = left.join(right, on=['key1', 'key2'], how='inner')

Example 3: join tables pandas

In [88]: result = left.join(right, how='inner')