/Python/Pandas create a new column based on condition of two columns

Pandas create a new column based on condition of two columns

Pandas create new column conditional on other columns

# For creating new column with multiple conditions
conditions = [
    (df['Base Column 1'] == 'A') & (df['Base Column 2'] == 'B'),
    (df['Base Column 3'] == 'C')]
choices = ['Conditional Value 1', 'Conditional Value 2']
df['New Column'] = np.select(conditions, choices, default='Conditional Value 1')

Pandas create a new column based on condition of two columns

conditions = [
    df['gender'].eq('male') & df['pet1'].eq(df['pet2']),
    df['gender'].eq('female') & df['pet1'].isin(['cat', 'dog'])
]

choices = [5,5]

df['points'] = np.select(conditions, choices, default=0)

print(df)
     gender      pet1      pet2  points
0      male       dog       dog       5
1      male       cat       cat       5
2      male       dog       cat       0
3    female       cat  squirrel       5
4    female       dog       dog       5
5    female  squirrel       cat       0
6  squirrel       dog       cat       0

Source: stackoverflow.com

Similar codes

0 vote280 views1 answer
Python declare variable type array
Python
1 vote272 views1 answer
Add column in spark dataframe
Python
0 vote253 views1 answer
Django update field after save
Python
0 vote254 views1 answer
Inicio programacao python
Python
15 votes251 views2 answers
Python make api request
Python
0 vote269 views1 answer
Fouier transformation in python open cv
Python
6 votes237 views1 answer
Unicodeencodeerror: 'charmap' codec can't encode characters in position 0-3: character maps to <undefined>
Python
0 vote293 views1 answer
Pil saves blue images
Python
0 vote247 views1 answer
What is from_records in DataFrame() pandas in python?
Python
5 votes290 views3 answers
Concatenate two tensors pytorch
Python