PyCharm 2019.3 Help

Step through the program

Stepping is the process of controlling step-by-step execution of the program.

PyCharm provides a set of stepping actions, which are used depending on your strategy (for example, whether you need to go directly to the next line or enter the methods invoked on your way there).

The stepping buttons are located on the Debug tool window toolbar.

Debug tool window

Step over

Steps over the current line of code and takes you to the next line even if the highlighted line has method calls in it. The implementation of the methods is skipped, and you move straight to the next line of the caller method.

  • Click the Step over button Step Over button or press F8.

If there are breakpoints inside the skipped methods, the debugger will stop at them. If needed to skip any breakpoints on the way, use Force step over.

Step into

Steps into the method to show what happens inside it. Use this option when you are not sure the method is returning a correct result.

  • Click the Step into button Step Into button or press F7.

If there are several method calls on the line, PyCharm asks you which method to enter. This feature is called Smart step into.

Some methods are skipped by Step into as you normally don't need to debug them. This list can be fine-tuned on the Build, Execution, Deployment | Debugger | Stepping page of the Settings/Preferences dialog Ctrl+Alt+S.

Smart step into

Smart step into is helpful when there are several method calls on a line, and you want to be specific about which method to enter. This feature allows you to select the method call you are interested in.

  1. From the main menu, select Run | Smart Step Into or press Shift+F7.

  2. Click the method or select it using the arrow keys and press Enter/F7.

You can configure Smart step into to be used instead of the regular Step into every time there are multiple method calls on the line. This is done in Settings/Preferences | Build, Execution, Deployment | Debugger | Stepping .

Step out

Steps out of the current method and takes you to the caller method.

  • Click the Step out button Step Out button or press Shift+F8.

Run to cursor

Continues the execution until the position of the caret is reached.

  1. Place the caret at the line where you want the program to pause.

  2. Click the Run to cursor button Run to Cursor button or press Alt+F9.

Also, you can Run to Cursor with a single click. For this, click the line number in the gutter.

You can configure whether you want Run to Cursor to work on clicking a line number in Settings/Preferences | Build, Execution, Deployment | Debugger.

If needed to skip any breakpoints on the way, use Force run to cursor.

Force step into

Steps in the method even if this method is skipped by the regular Step Into.

  • Click the Force step into button Force Step Into icon or press Shift+Alt+F7.

Force run to cursor

Continues the execution until the position of the caret is reached. All breakpoints on the way are ignored.

  1. Place the caret at the line where you want the program to pause.

  2. From the main menu, select Run | Force Run to Cursor or press Ctrl+Alt+F9.

Force step over

Steps over the current line of code and takes you to the next line even if the highlighted line has method calls in it. If there are breakpoints in the called methods, they are ignored.

  • From the main menu, select Run | Force Step Over or press Shift+Alt+F8.

When a breakpoint is reached or your program is suspended, the Debug tool window becomes active and enables you to get control over the program's execution. For this purpose, you can use the Run menu commands, or the icons on the stepping toolbar of in the Debug tool window.

Each stepping action advances the execution point to the next execution location, depending on the action you choose.

Last modified: 10 December 2019