Exercise

# A timeline compliant population

Assume that you want to construct a basetable for a predictive model that predicts whether donors will donate in 2018. The timeline indicates that the population should contain all donors that donated at least once since January 1st 2013, but made no donations after January 1st 2017.
Given is a pandas dataframe `gifts`

with all the donations made since 2010. In this exercise, you will construct a set with the donor ids of all donors in the population.

Instructions

**100 XP**

- Construct a dataframe
`gifts_include`

containing all gifts made in 2013 or later and a dataframe`gifts_exclude`

containing all gifts made in 2017 or later. - Construct a set
`donors_include`

containing all donor ids of donors in`gifts_include`

and a set`donors_exclude`

containing all donor ids of donors in`gifts_exclude`

. - Construct the population using the
`.difference()`

method on your two sets.