try:    import idlelib.PyShellexcept ImportError:    # IDLE is not installed, but maybe PyShell is on sys.path:    try:        import PyShell    except ImportError:        raise    else:        import os        idledir = os.path.dirname(os.path.abspath(PyShell.__file__))        if idledir != os.getcwd():            # We're not in the IDLE directory, help the subprocess find run.py            pypath = os.environ.get('PYTHONPATH', '')            if pypath:                os.environ['PYTHONPATH'] = pypath + ':' + idledir            else:                os.environ['PYTHONPATH'] = idledir        PyShell.main()else:    idlelib.PyShell.main()