Only list-like objects are allowed to be passed to isin(), you passed a [str]

The error message “only list-like objects are allowed to be passed to isin(), you passed a [str]” indicates that the isin() function in the pandas library expects a list-like object as one of its arguments, but you have passed a string instead.

The isin() function is typically used to check if a value is present in a list or a column of a pandas DataFrame. When using this function, one of the arguments should be a list or a pandas Series object containing the values to be checked against. However, in your case, you have passed a single string object instead of a list or a Series.

Here’s an example to illustrate the correct usage of the isin() function:

import pandas as pd

# Create a DataFrame
df = pd.DataFrame({'A': ['foo', 'bar', 'baz', 'qux'],
                   'B': [1, 2, 3, 4]})

# Check if values in column 'A' are present in a list
values_to_check = ['foo', 'baz']
result = df['A'].isin(values_to_check)

print(result)
  

In this example, we create a DataFrame with two columns ‘A’ and ‘B’. We then define a list called values_to_check containing the values ‘foo’ and ‘baz’. We use the isin() function on the column ‘A’ of the DataFrame to check if each value in that column is present in the values_to_check list. The result is a boolean Series indicating whether each value in ‘A’ is present in the list.

If you encounter the error message “only list-like objects are allowed to be passed to isin(), you passed a [str]”, make sure to review the arguments you are passing to the isin() function. Ensure that any object you pass as a potential list of values is indeed a list, Series, or a similar list-like object.