Section 8.8 - maybe introduce the code instead of simply putting two there?

**What Course are you in**
cpp4python

**What Page were you on**
section 8.8

**What is your username**
maalims

**Describe the bug**
This is not a bug but a suggestion. The section is a bit dry in terms of explanation, it would be helpful if the author explained how the code works so the reader can understand how it works.

**Traceback**
The codes are in section 8.8 of the book.

