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pythonstringpandaserror-handling
jeangelj
jeangelj

Reputation: 4498

Python Pandas: AttributeError: 'str' object has no attribute 'loc'

Working with dataframe df:

Count
1
2
3
4
5

Want to add second column, that categorizes everything above 3 as '4+' - needed output:

Count | Category
1        1
2        2
3        3
4        4+
5        4+

This is my code:

df['Category'] = df['Count']
df = df.loc[df['Count'] > 3, 'Category'] = '4+'

And I get this error:

AttributeError: 'str' object has no attribute 'loc'

Upvotes: 3

Views: 28055

Answers (2)

Cedric Zoppolo
Cedric Zoppolo

Reputation: 4743

You can try out with:

import pandas as pd
df = pd.DataFrame({"Count": [1,2,3,4,5]})
df["Category"] = df["Count"].apply(str)
df["Category"][df['Count'] > 3] = "4+"

Output would be:

>>> df
   Count Category
0      1        1
1      2        2
2      3        3
3      4       4+
4      5       4+

Upvotes: 1

Vaishali
Vaishali

Reputation: 38415

Just go with

df['Category'] = df['Count']
df.loc[df['Count'] > 3, 'Category'] = '4+'

Upvotes: 6

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