PyShell.py 文件源码

def begin(self):
        self.text.mark_set("iomark", "insert")
        self.resetoutput()
        if use_subprocess:
            nosub = ''
            client = self.interp.start_subprocess()
            if not client:
                self.close()
                return False
        else:
            nosub = ("==== No Subprocess ====\n\n" +
                    "WARNING: Running IDLE without a Subprocess is deprecated\n" +
                    "and will be removed in a later version. See Help/IDLE Help\n" +
                    "for details.\n\n")
            sys.displayhook = rpc.displayhook

        self.write("Python %s on %s\n%s\n%s" %
                   (sys.version, sys.platform, self.COPYRIGHT, nosub))
        self.text.focus_force()
        self.showprompt()
        import tkinter
        tkinter._default_root = None # 03Jan04 KBK What's this?
        return True