Simplify Constant Sum

Sourcery refactoring id: simplify-constant-sum

Description

Simplify constant sum call.

Before

sum(1 for book in books if book.author == "Terry Pratchett")

After

sum(book.author == "Terry Pratchett" for book in books)

Explanation

As sum add the values it treats True as 1, and False as 0. We make use of this fact to simplify the generator expression inside the sum call.