7. Becoming Pythonic

Activity 18: Building a Chess Tournament

Solution:

1. Open the Jupyter Notebook.
2. Define the list of player names in Python:

   names = ["Magnus Carlsen", "Fabiano Caruana", "Yifan Hou", "Wenjun Ju"]

3. The list comprehension uses the list of names twice because each person can either be player 1 or player 2 in a match (that is, they can play with the white or the black pieces). Because we don't want the same person to play both sides in a match, add an if clause that filters out the situation where the same name appears in both elements of the comprehension:

   fixtures = [f"{p1} vs. {p2}" for p1 in names for p2 in names if p1 != p2]

4. Finally, print the resulting list so that the match officials can see who will be playing whom:

   print(fixtures)

   You should get the following output:

Figure 7.30: The sorted fixtures' output using a list comprehension

In this activity, we...