AttributeError: ‘str’ object has no attribute ‘isin’
This error message in Python typically occurs when you try to use the isin function on a string object, but the isin function is not a valid method for strings.
The isin function is used to check whether elements in a specific series or DataFrame belong to a particular set of values. However, in this case, you are trying to use it on a string, which doesn’t have the isin method, resulting in an AttributeError.
Here’s an example to better understand the error:
cities = "New York, London, Paris, Tokyo"
print(cities.isin(["London", "Paris"]))
# AttributeError: 'str' object has no attribute 'isin'
In the above example, we have a string called cities, which is not a Pandas Series or DataFrame. When we try to use the isin function on a string, it raises an AttributeError because the method doesn’t exist for strings.
Solution:
To resolve this error, you need to make sure you are using the isin function on a Pandas Series or DataFrame, not on a string object. Here’s an updated example:
import pandas as pd
cities = pd.Series(["New York", "London", "Paris", "Tokyo"])
print(cities.isin(["London", "Paris"]))
# Output: [False, True, True, False]
In the above example, we have created a Pandas Series called cities using pd.Series(). Now we can successfully use the isin function on the cities Series to check whether each element belongs to the specified set of values.