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Exercise

Lazy approach

You have done some cleaning in your dataset but you are worried that there are sentences encased in parentheses that may cloud your analysis.

Again, a greedy or a lazy quantifier may lead to different results.

For example, if you want to extract a word starting with a and ending with e in the string I like apple pie, you may think that applying the greedy regex a.+e will return apple. However, your match will be apple pie. A way to overcome this is to make it lazy by using ? which will return apple.

The re module and the variable sentiment_analysis are already loaded in your session.

Instructions 1/2

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  • 1

    Use a greedy quantifier to match text that appears within parentheses in the variable sentiment_analysis.

  • 2

    Now, use a lazy quantifier to match text that appears within parentheses in the variable sentiment_analysis.