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In this mode, you can enter some commands and expressions. You can enable Python console in the debugging Console. See the Evaluate expressions section for details. With evaluate expression you can do things that you can't do with a watch: you can change things.ДЇor example, if you enter the desired value of the odometer, say, 50, and then continue stepping through your script, you will get the following: Then in the dialog that opens, click Evaluate:ДЄctually, you could see the same thing with a watch. For example, if you want to see the value of a variable, click the button. If you don't see the inline debugging values, check that it's enabled using the settings icon on the Debug tool window: Evaluating expressionsДЇinally, you can evaluate any expression at any time. This inline debugging feature is enabled by default. As soon as you press any breakpoint, Pењњharm shows you the value of many of your variables right in the editor:

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You may have noticed another Pењњharm feature that makes it easy to see what your code is doing: the inline debugger. However, when the program execution continues to the scope that defines the variable, the watch gets the following view: Note that code completion is available here:ДЄt first, you see the time equals nil- it means that the variable is not yet defined: Just click on the toolbar of the Watches tab, and type the name of the variable you want to watch - let it be my_car.time. See the Stepping toolbar and Step through the program sections for details. If you want to concentrate on your own code, use the Step Into My Code button - thus you'll avoid stepping into library classes. However, if you continue using, you'll see that your application just passes to the next loop: If you click the Step Into button, you will see that after the line action = input('What should I do? ccelerate, rake, ' 'show dometer, or show average peed?').upper() the debugger goes into the file parse.py: We can use the stepping toolbar buttons to choose on which line we'd like to stop next.ДЇor example, click the Step Over button and see the blue marker moving to the next line of code: Let's see what it looks like to step through our example program: click the button, go to the Console to ask for the car's average speed (type 'S'), and we can see that we press our breakpoint. If you want to see what your code does line by line, there's no need to put a breakpoint on every line, you can step through your code. If you want the console to be always visible, you can drag it to one of the Pењњharm window's edges. The Debug tool window shows dedicated panes for frames, variables, and watches, and the console, where all the input and output information is displayed. Let's take a closer look to see how the debugger can show your what your code is doing. Pењњharm creates a stub if construct, leaving you with the task of filling it with the proper contents. To do that, select the statement return self.odometer / self.time in the method average_speed and then press Ctrl+Alt+T ( Code | Surround with): To avoid running into the same problem again, let's add an if statement to check whether the time equals zero. You can also see in the debugger, that the value self.time is equal to zero: Surrounding code The debugger also shows the error message. Another breakpoint appeared as well: by default Pењњharm will halt for any exception that wasn't caught in your code, and it'll show an icon of a breakpoint with a lightning bolt. Pењњharm starts a debugging session and shows the Debug tool windowД¬lick the button to proceed with the script execution and in the Console tab, enter S and press Enter:Д¬lick the button to resume the script execution.

Next, click the icon in the gutter, next to the main clause, and choose Debug 'Car'. To create breakpoints, just click in the gutter

To start debugging, you have to set some breakpoints first. We can use the Pењњharm debugger to see exactly whatвЂ™s happening in our code. LetвЂ™s dig a little deeper into our code to find out whatвЂ™s going wrong. Pењњharm reports a runtime error: a ZeroDivisionError. Let's see what happens when we start our script up, and try to find out our average speed: