pandas joining data frames code example

Example 1: join to dataframes pandas

>>> df.join(other.set_index('key'), on='key')
  key   A    B
0  K0  A0   B0
1  K1  A1   B1
2  K2  A2   B2
3  K3  A3  NaN
4  K4  A4  NaN
5  K5  A5  NaN

Example 2: pandas join dataframe

#https://pandas.pydata.org/docs/user_guide/merging.html