Exercise

Caching a DataFrame

You've been assigned a task that requires running several analysis operations on a DataFrame. You've learned that caching can improve performance when reusing DataFrames and would like to implement it.

You'll be working with a new dataset consisting of airline departure information. It may have repetitive data and will need to be de-duplicated.

The DataFrame departures_df is defined, but no actions have been performed.

Instructions

100 XP

Cache the unique rows in the departures_df DataFrame.
Perform a count query on departures_df, noting how long the operation takes.
Count the rows again, noting the variance in time of a cached DataFrame.

Take Hint (-30 XP)