merge pandas dataframe on certain values code example
Example 1: pandas left join
df.merge(df2, left_on = "doc_id", right_on = "doc_num", how = "left")Example 2: combine df columns python
df["period"] = df["Year"] + df["quarter"]df.merge(df2, left_on = "doc_id", right_on = "doc_num", how = "left")df["period"] = df["Year"] + df["quarter"]