# At top
import tempfile  #+++++++++++++++++++++

    def _run_module_event(self, event):
        filename = self.getfilename()
        tempCode = None #+++++++++++++++++++++
        if not filename:            
            tempCode = tempfile.NamedTemporaryFile(suffix = ".py") #+++++++++++++++++++++
            filename = tempCode.name #****Added***
            self.editwin.io.writefile( filename ) #+++++++++++++++++++++
            self.editwin.io.optedTemp = True #+++++++++++++++++++++
            #return 'break'
        code = self.checksyntax(filename)
        ......
        interp.runcode(code)
        if tempCode is not None: #+++++++++++++++++++++
            tempCode.close() #+++++++++++++++++++++
        return 'break'

    def getfilename(self):
        filename = self.editwin.io.filename
        if not self.editwin.get_saved():
            autosave = idleConf.GetOption('main', 'General',
                                          'autosave', type='bool')
            if autosave and filename:
                self.editwin.io.save(None)
            elif self.editwin.io.optedTemp: #+++++++++++++++++++++
                filename = None #+++++++++++++++++++++
            else:
                confirm = self.ask_save_dialog()
                self.editwin.text.focus_set()
                if confirm:
                    self.editwin.io.save(None)
                    filename = self.editwin.io.filename
                else:
                    filename = None
        return filename

def __init__(self, editwin):
        #....
        self.__id_print = self.text.bind("<<print-window>>", self.print_window)
        self.optedTemp = False #+++++++++++++++++++++

def save_as(self, event):
        filename = self.asksavefile()
        if filename:
            if self.writefile(filename):
                self.set_filename(filename)
                self.set_saved(1)
                self.optedTemp = False #+++++++++++++++++++++
                try:
                    self.editwin.store_file_breaks()
                except AttributeError:
                    ....