pandas put two data frames together code example

Example 1: merge two dataframes based on column

df_outer = pd.merge(df1, df2, on='id', how='outer')

df_outer

Example 2: combining 2 dataframes pandas

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

Example 3: pandas combine two data frames with same index and same columns

pd.merge(df1, df2, left_index=True, right_index=True, how='outer')

Example 4: combine df columns python

df["period"] = df["Year"] + df["quarter"]