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.

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.

Exercise

Lazy approach

Instructions 1/2