python-pandasHow to left join dataframes

Usage example

import pandas as pd

df = pd.DataFrame({
  'Phone': ['ip5', 'ip6', 'ip8', 'sms', 'xi'],
  'Price': [204, 304, 404, 405, 305]
})

df_more = pd.DataFrame({
  'Phone': ['ip5', 'ip6'],
  'Color': ['red', 'black']
})

df = df.join(df_more.set_index('Phone'), on='Phone', how='left')

print(df)

output

  Phone  Price  Color
0   ip5    204    red
1   ip6    304  black
2   ip8    404    NaN
3   sms    405    NaN
4    xi    305    NaN