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  3. Python Data Science Toolbox (Part 1)

Exercise

Bringing it all together (2)

Sometimes, we make mistakes when calling functions - even ones you made yourself. But don't fret! In this exercise, you will improve on your previous work with the count_entries() function in the last chapter by adding a try-except block to it. This will allow your function to provide a helpful message when the user calls your count_entries() function but provides a column name that isn't in the DataFrame.

Once again, for your convenience, pandas has been imported as pd and the 'tweets.csv' file has been imported into the DataFrame tweets_df. Parts of the code from your previous work are also provided.

Instructions

100 XP
  • Add a try block so that when the function is called with the correct arguments, it processes the DataFrame and returns a dictionary of results.
  • Add an except block so that when the function is called incorrectly, it displays the following error message: 'The DataFrame does not have a ' + col_name + ' column.'.