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  3. Regular Expressions in Python

Exercise

Surrounding words

Now, you want to perform some visualizations with your sentiment_analysis dataset. You are interested in the words surrounding python. You want to count how many times a specific word appears right before and after it.

Positive lookahead (?=) makes sure that first part of the expression is followed by the lookahead expression. Positive lookbehind (?<=) returns all matches that are preceded by the specified pattern.

The variable sentiment_analysis, containing the text of one tweet, and the re module are loaded in your session. You can use print() to view the data in the IPython Shell.

Instructions 1/2

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  • 1

    Get all the words that are followed by the word python in sentiment_analysis. Print out the word found.

  • 2

    Get all the words that are preceded by the word python or Python in sentiment_analysis. Print out the words found.