Calculating boolean statistics

When first getting introduced to boolean Series, it can be informative to calculate basic summary statistics on them. Each value of a boolean series evaluates to 0 or 1 so all the Series methods that work with numerical values also work with booleans.

Getting ready

In this recipe, we create a boolean Series by applying a condition to a column of data and then calculate summary statistics from it.

How to do it...

1. Read in the movie dataset, set the index to the movie title, and inspect the first few rows:

>>> movie = pd.read_csv('data/movie.csv', index_col='movie_title')
>>> movie.head()

2. Determine whether the duration of each movie is longer than two hours by using the greater than comparison operator with the duration Series:

>>> movie_2_hours = movie['duration'] > 120
>>> movie_2_hours.head(10)
movie_title
Avatar                                         True
Pirates of the Caribbean: At World's End       True
Spectre         ...