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[pandas] [tutorial] check if a group of columns are missing

jack06215
Sep 26th, 2020 (edited)
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  1. pattern_1 = ['var_4', 'var_5']
  2. df['flag_1'] = df[pattern_1].isnull().any(axis=1).astype(int)
  3.  
  4. pattern_2 = ['var_1', 'var_3']
  5. df['flag_2'] = df[pattern_2].isnull().any(axis=1).astype(int)
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