问题
I solved this already, I'm just posting it here because I couldn't figure it out with google, or by reading the docs. I only found it by accident.
To add a breakpoint, right-click on the line that you want to add a breakpoint on and select "Set Breakpoint". The line will become highlighted. (Note that this only works when you are editing a file; it does not work at the interpreter.)
This site has a detailed tutorial about using the IDLE debugger.
On Mac, you need to Control-click instead of right clicking.
回答1:
There is an open Python issue about the lack of documentation for IDLE breakpoints. Contributions welcome!
Update: The on-line documentation and the IDLE help files (for 2.7.4, 3.2.4, and 3.3.0) have been updated, with Nick's help.
回答2:
Completing the answer supplied by the OP: after setting the breakpoint - you must turn on IDLE's debug mode (using debug --> debugger). When you run the program, press "Go" in the debug window that opens up and IDLE will stop at the breakpoint.
回答3:
You can set breakpoint before it is run.
- Set the breakpoint by right clicking on the relevant line of your program
- On your python shell, look for Debug - [Debug On] will be shown in your IDLE Python shell
- Go back to your program and press F5(hotkey) to run the program, it will stop in the relevant break line(s)
- If you want to look at some global variables or line of codes, you can check the box in the debugger
回答4:
Just adding to this answer (would've commented but for the rules that say I don't have enough reputation to do so): On the Mac you must control-click. The normal "right-click" at least for the trackpad does not work to bring up the contextual menu with the option to set a breakpoint.
来源：https://stackoverflow.com/questions/6246878/how-do-you-add-breakpoints-to-a-python-program-in-idle