AttributeError: 'DataFrame' object has no attribute 'extract'

This error message indicates that you are trying to call the 'extract' method on a pandas DataFrame object, but this method does not exist for this object. It is likely that you meant to call the 'str.extract' method on a column of the DataFrame, rather than the DataFrame itself.

For example, if you have a DataFrame called 'df' with a column called 'text', and you want to extract a substring from this column using a regular expression, you can use the following code:

df['text'].str.extract(r'(\d+)')

This will extract the first group of consecutive digits from each string in the 'text' column and return a new DataFrame with these substrings.