运行时未调用的打印方法，调试时调用

I created a class with four methods. I inserted print statements into them, so I could see if they work properly. There is no problem with the first three. But when I call the fourth method nothing prints out. Strangely when I initiate debugger and move through the method step by step, the statements are called(and output printed). How can this be?I created a class with four methods. I inserted