`train.info(null_counts=True)` raises TypeError with recent pandas versions

[larrymargerum01]

The notebook 14_working_with_text_data/05_sentiment_analysis_twitter.ipynb uses train.info(null_counts=True).

With recent versions of pandas, this raises a TypeError because the null_counts argument is no longer supported.

Steps to reproduce

1. Open 14_working_with_text_data/05_sentiment_analysis_twitter.ipynb.
2. Run the notebook with a recent version of pandas.
3. Execute the cell containing train.info(null_counts=True).

Expected behavior

The cell should display the DataFrame information without raising an error.

Actual behavior

A TypeError is raised because null_counts is not a valid argument for DataFrame.info() in recent pandas versions.

Suggested fix

Update the notebook to use the current pandas API for displaying null-value information, or document a compatible pandas version.