On 9/17/2014 9:34 PM, Seymore4Head wrote:
On Wed, 17 Sep 2014 18:56:47 -0400, Terry Reedy <tjre...@udel.edu>
A little digging with Idle's grep (Find in Files) shows that the message is produced by this code in idlelib/PyShell.py, about 825. def display_executing_dialog(self): tkMessageBox.showerror( "Already executing", "The Python Shell window is already executing a command; " "please wait until it is finished.", master=self.tkconsole.text) This function is only called here (about line 735) def runcommand(self, code): "Run the code without invoking the debugger" # The code better not raise an exception! if self.tkconsole.executing: self.display_executing_dialog() <else run idle code in user process output view user> How is this run? Run-Module F5 invokes ScriptBinding.run_module_event(116) and thence _run_module_event (129). This methods includes this. if PyShell.use_subprocess: interp.restart_subprocess(with_cwd=False) restart_subprocess includes these lines (starting at 470): # Kill subprocess, spawn a new one, accept connection. self.rpcclt.close() self.terminate_subprocess() console = self.tkconsole ... console.executing = False # == self.tkconsole ... self.transfer_path(with_cwd=with_cwd) transfer_path calls runcommand but only after tkconsole.executing has been set to False. But this only happens if PyShell.use_subprocess is True, which it normally is, but not if one starts Idle with the -n option. After conditionally calling interp.restart_subprocess, _run_module_event directly calls interp.runcommand, which can fail when running with -n. Are you? This is the only way I know to get the error message. Is so, the second way to not get the error message is to not use -n and run normally.Sorry. I don't speak python yet. Quite a few of the above terms are new to me. It may be that was trying to run the program again before the current one was finished. In the past I was getting the error when I was (almost) sure the program had finished. I will be more careful in the future, but I will also keep an eye out for the problem to repeat. I just tried to run the above program again and gave it more time to finish and I did not get the error, so it could well be I was jumping the gun.
My question was "How do you start Idle?" (I can make a difference.) -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
