tkconch.py 文件源码

def deferredAskFrame(question, echo):
    if frame.callback:
        raise "can't ask 2 questions at once!"
    d = defer.Deferred()
    resp = []
    def gotChar(ch, resp=resp):
        if not ch: return
        if ch=='\x03': # C-c
            reactor.stop()
        if ch=='\r':
            frame.write('\r\n')
            stresp = ''.join(resp)
            del resp
            frame.callback = None
            d.callback(stresp)
            return
        elif 32 <= ord(ch) < 127:
            resp.append(ch)
            if echo:
                frame.write(ch)
        elif ord(ch) == 8 and resp: # BS
            if echo: frame.write('\x08 \x08')
            resp.pop()
    frame.callback = gotChar
    frame.write(question)
    frame.canvas.focus_force()
    return d