Changing a string column into several boolean columns using pandas

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Track title: Hypnotic Puzzle2

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Chapters
00:00 Question
00:39 Accepted answer (Score 5)
01:17 Answer 2 (Score 4)
01:37 Answer 3 (Score 4)
01:56 Thank you

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Full question
https://stackoverflow.com/questions/5514...

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Content licensed under CC BY-SA
https://meta.stackexchange.com/help/lice...

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Tags
#python #pandas

#avk47

ACCEPTED ANSWER

Score 5

I think this should be a good use case for get_dummies:

df.set_index('Name')['Fruit'].str.get_dummies().astype(bool).reset_index()

     Name  Apple  Banana  Citrus
0    Alex   True   False   False
1     Bob  False    True   False
2   Clark  False   False    True
3   Diana  False    True   False
4   Elisa   True   False   False
5   Frida  False   False    True
6  George  False   False    True
7   Hanna  False    True   False

In similar vein, we have,

pd.concat([df['Name'], df['Fruit'].str.get_dummies().astype(bool)], axis=1)

     Name  Apple  Banana  Citrus
0    Alex   True   False   False
1     Bob  False    True   False
2   Clark  False   False    True
3   Diana  False    True   False
4   Elisa   True   False   False
5   Frida  False   False    True
6  George  False   False    True
7   Hanna  False    True   False

ANSWER 2

Score 4

You can use the below:

df[['Name']].join(pd.get_dummies(df.Fruit).astype(bool))

     Name  Apple  Banana  Citrus
0    Alex   True   False   False
1     Bob  False    True   False
2   Clark  False   False    True
3   Diana  False    True   False
4   Elisa   True   False   False
5   Frida  False   False    True
6  George  False   False    True
7   Hanna  False    True   False

ANSWER 3

Score 4

Seems like crosstab is fine

pd.crosstab(df.Name,df.Fruit).astype(bool).reset_index()
Out[90]: 
Fruit    Name  Apple  Banana  Citrus
0        Alex   True   False   False
1         Bob  False    True   False
2       Clark  False   False    True
3       Diana  False    True   False
4       Elisa   True   False   False
5       Frida  False   False    True
6      George  False   False    True
7       Hanna  False    True   False