[Tutor] Urgent question about program debugging

I just created a "who's your daddy?" program--one of the challenges in the michael dawson book. It was working well, and I tested all the different instructions, and then for some reason, it stopped working. Specifically, whenever I enter the name of a father, it tells me it doesn't exist, althoug

[Tutor] Guessing a number with limited no. of tries game gone wrong.

I am a newbie at Python. Just bought Python Programming 2nd ed. by Michael Dawson. While I understand the concepts as the book is going through the code, and I am able get the same results, when it comes to applying what I've learned to the exercises at the end of each chapter, I seem to be stu