Python Winsound標志錯誤？

Question

因此，我正在嘗試制作一個簡單的啟動/停止音樂播放器。 對於winsound.PlaySound命令，語法令人困惑。 我檢查了文檔和論壇，但似乎找不到答案。 這是我的代碼，以及我要完成的工作。

import Tkinter, Tkconstants, tkFileDialog
import winsound

class MusicPlayer(Tkinter.Frame):

  def __init__(self, root):

    Tkinter.Frame.__init__(self, root)

    # options for buttons
    button_opt = {'fill': Tkconstants.BOTH, 'padx': 5, 'pady': 5}

    # define buttons
    Tkinter.Button(self, text='Play', command=self.play).pack(**button_opt)
    Tkinter.Button(self, text='Stop', command=self.stop).pack(**button_opt)    
    # define options for opening or saving a file
    self.file_opt = options = {}
    options['defaultextension'] = '*.wav'
    options['filetypes'] = [('WAV Sound Files', '*.wav')]
    options['initialdir'] = 'C:\\'
    options['initialfile'] = '.wav'
    options['parent'] = root
    options['title'] = 'Pick a File'

    # This is only available on the Macintosh, and only when Navigation Services are installed.
    #options['message'] = 'message'

    # if you use the multiple file version of the module functions this option is set automatically.
    #options['multiple'] = 1

    # defining options for opening a directory
    self.dir_opt = options = {}
    options['initialdir'] = 'C:\\'
    options['mustexist'] = False
    options['parent'] = root
    options['title'] = 'Pick a Dir'

  def askopenfile(self):

    return tkFileDialog.askopenfile(mode='r', **self.file_opt)

  def askopenfilename(self):

    # get filename
    filename = tkFileDialog.askopenfilename(**self.file_opt)

    # open file on your own
    if filename:
      return open(filename, 'r')
      print filename

  def asksaveasfile(self):

    return tkFileDialog.asksaveasfile(mode='w', **self.file_opt)

  def asksaveasfilename(self):

    # get filename
    filename = tkFileDialog.asksaveasfilename(**self.file_opt)

    # open file on your own
    if filename:
      return open(filename, 'w')

  def askdirectory(self):


    return tkFileDialog.askdirectory(**self.dir_opt)

  def play(self):
    soundfile = self.askopenfilename
    winsound.PlaySound(soundfile, soundfile)

  def stop(self):
    winsound.PlaySound(None, SND_PURGE)

if __name__=='__main__':
  root = Tkinter.Tk()
  MusicPlayer(root).pack()
  root.wm_title('Music Player')
  root.mainloop()

我要做什么

我似乎無法找出winsound.PlaySound flag的正確語法。 我嘗試了winsound.PlaySound(filename, SND_FILENAME) ，對於停止按鈕，我嘗試了winsound.PlaySound(None, SND_PURGE) 。

我得到的錯誤

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python27\lib\lib-tk\Tkinter.py", line 1532, in __call__
    return self.func(*args)
  File "C:\Users\Brenneman.Josh.19\Downloads\Code\MusicPlayer.py", line 72, in play
    winsound.PlaySound(soundfile, SND_FILENAME)
NameError: global name 'SND_FILENAME' is not defined
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python27\lib\lib-tk\Tkinter.py", line 1532, in __call__
    return self.func(*args)
  File "C:\Users\Brenneman.Josh.19\Downloads\Code\MusicPlayer.py", line 75, in stop
    winsound.PlaySound(None, SND_PURGE)
NameError: global name 'SND_PURGE' is not defined

怎么了？

Answer 1

錯誤消息告訴您SND_PURGE和SND_FILENAME 。 由於我看不到您定義或導入它們，因此為什么會出現錯誤是可以理解的。

查看winsound的文檔，似乎這些是該模塊的屬性。 因此，解決方案是導入它們，或為它們添加模塊名稱前綴。

由於您已經導入了模塊，因此只需在模塊名稱前加上前綴即可：

winsound.PlaySound(soundfile, winsound.SND_FILENAME)
winsound.PlaySound(None, winsound.SND_PURGE)

（注意， winsound.前綴來SND_FILENAME和SND_PURGE ）

Answer 2

嘗試更改askopenfilename並play以下內容：

def askopenfilename(self):

    # get filename
    filename = tkFileDialog.askopenfilename(**self.file_opt)

    # open file on your own
    if filename:
        return filename
        print filename

def play(self):
    soundfile = self.askopenfilename()

    winsound.PlaySound(soundfile, winsound.SND_FILENAME)

有關更多信息，請參見winsound.PlaySound 。