Answers for "new dataframe with same column as"

2

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
Posted by: Guest on December-01-2020
0

pandas set one column equal to another

In [300]:
df.loc[df['colA'] == 'a', 'colC'] = df['colB']
df['colC'] = df['colC'].fillna(0)
df

Out[300]:
   id colA  colB  colC
0   0    a    13    13
1   1    a    52    52
2   2    b    16     0
3   3    a    34    34
4   4    b   946     0
Posted by: Guest on October-27-2021

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