python-pandasHow to select null values from dataframe

Usage example

import pandas as pd

df = pd.DataFrame({
  'phone': ['ip5', 'ip6', None, 'sms', 'xi'],
  'price': [204, 304, 404, 405, 305]
})

found = df[df['phone'].isna()]
print(found)

output

  phone  price
2  None    404