我一直在寻找一个用 python 编写的简单 mp3 播放器示例，发现了这个： http: //www.blog.pythonlibrary.org/2010/04/20/wxpython-creating-a-simple-mp3-player/
我一直在尝试运行它，但它在第 134 行失败（调用“加载”方法时）
错误回溯：
Traceback (most recent call last):
File "player_skeleton2.py", line 161, in onBrowse
self.loadMusic(path)
File "player_skeleton2.py", line 135, in loadMusic
wx.MessageBox("Unable to load %s: Unsupported format?" % path,
NameError: global name 'path' is not defined
我在想也许这与我在 Mac OS 上有关
任何人都可以帮助我，或者可以为我提供一个不同的 mp3 播放器示例吗？
非常感谢！
播放器代码：
#----------------------------------------------------------------------
# player_skeleton2.py
#
# Created: 04/15/2010
#
# Author: Mike Driscoll - mike@pythonlibrary.org
#----------------------------------------------------------------------
import os
import wx
import wx.media
import wx.lib.buttons as buttons
dirName = os.path.dirname(os.path.abspath(__file__))
bitmapDir = os.path.join(dirName, 'bitmaps')
########################################################################
class MediaPanel(wx.Panel):
""""""
#----------------------------------------------------------------------
def __init__(self, parent):
"""Constructor"""
wx.Panel.__init__(self, parent=parent)
self.frame = parent
self.currentVolume = 50
self.createMenu()
self.layoutControls()
sp = wx.StandardPaths.Get()
self.currentFolder = sp.GetDocumentsDir()
self.timer = wx.Timer(self)
self.Bind(wx.EVT_TIMER, self.onTimer)
self.timer.Start(100)
#----------------------------------------------------------------------
def layoutControls(self):
"""
Create and layout the widgets
"""
try:
self.mediaPlayer = wx.media.MediaCtrl(self, style=wx.SIMPLE_BORDER)
except NotImplementedError:
self.Destroy()
raise
# create playback slider
self.playbackSlider = wx.Slider(self, size=wx.DefaultSize)
self.Bind(wx.EVT_SLIDER, self.onSeek, self.playbackSlider)
self.volumeCtrl = wx.Slider(self, style=wx.SL_VERTICAL|wx.SL_INVERSE)
self.volumeCtrl.SetRange(0, 100)
self.volumeCtrl.SetValue(self.currentVolume)
self.volumeCtrl.Bind(wx.EVT_SLIDER, self.onSetVolume)
# Create sizers
mainSizer = wx.BoxSizer(wx.VERTICAL)
hSizer = wx.BoxSizer(wx.HORIZONTAL)
audioSizer = self.buildAudioBar()
# layout widgets
mainSizer.Add(self.playbackSlider, 1, wx.ALL|wx.EXPAND, 5)
hSizer.Add(audioSizer, 0, wx.ALL|wx.CENTER, 5)
hSizer.Add(self.volumeCtrl, 0, wx.ALL, 5)
mainSizer.Add(hSizer)
self.SetSizer(mainSizer)
self.Layout()
#----------------------------------------------------------------------
def buildAudioBar(self):
"""
Builds the audio bar controls
"""
audioBarSizer = wx.BoxSizer(wx.HORIZONTAL)
self.buildBtn({'bitmap':'player_prev.png', 'handler':self.onPrev,
'name':'prev'},
audioBarSizer)
# create play/pause toggle button
img = wx.Bitmap(os.path.join(bitmapDir, "player_play.png"))
self.playPauseBtn = buttons.GenBitmapToggleButton(self, bitmap=img, name="play")
self.playPauseBtn.Enable(False)
img = wx.Bitmap(os.path.join(bitmapDir, "player_pause.png"))
self.playPauseBtn.SetBitmapSelected(img)
self.playPauseBtn.SetInitialSize()
self.playPauseBtn.Bind(wx.EVT_BUTTON, self.onPlay)
audioBarSizer.Add(self.playPauseBtn, 0, wx.LEFT, 3)
btnData = [{'bitmap':'player_stop.png',
'handler':self.onStop, 'name':'stop'},
{'bitmap':'player_next.png',
'handler':self.onNext, 'name':'next'}]
for btn in btnData:
self.buildBtn(btn, audioBarSizer)
return audioBarSizer
#----------------------------------------------------------------------
def buildBtn(self, btnDict, sizer):
""""""
bmp = btnDict['bitmap']
handler = btnDict['handler']
img = wx.Bitmap(os.path.join(bitmapDir, bmp))
btn = buttons.GenBitmapButton(self, bitmap=img, name=btnDict['name'])
btn.SetInitialSize()
btn.Bind(wx.EVT_BUTTON, handler)
sizer.Add(btn, 0, wx.LEFT, 3)
#----------------------------------------------------------------------
def createMenu(self):
"""
Creates a menu
"""
menubar = wx.MenuBar()
fileMenu = wx.Menu()
open_file_menu_item = fileMenu.Append(wx.NewId(), "&Open", "Open a File")
menubar.Append(fileMenu, '&File')
self.frame.SetMenuBar(menubar)
self.frame.Bind(wx.EVT_MENU, self.onBrowse, open_file_menu_item)
#----------------------------------------------------------------------
def loadMusic(self, musicFile):
""""""
if not self.mediaPlayer.Load(musicFile):
wx.MessageBox("Unable to load %s: Unsupported format?" % path,
"ERROR",
wx.ICON_ERROR | wx.OK)
else:
self.mediaPlayer.SetInitialSize()
self.GetSizer().Layout()
self.playbackSlider.SetRange(0, self.mediaPlayer.Length())
self.playPauseBtn.Enable(True)
#----------------------------------------------------------------------
def onBrowse(self, event):
"""
Opens file dialog to browse for music
"""
wildcard = "MP3 (*.mp3)|*.mp3|" \
"WAV (*.wav)|*.wav"
dlg = wx.FileDialog(
self, message="Choose a file",
defaultDir=self.currentFolder,
defaultFile="",
wildcard=wildcard,
style=wx.OPEN | wx.CHANGE_DIR
)
if dlg.ShowModal() == wx.ID_OK:
path = dlg.GetPath()
self.currentFolder = os.path.dirname(path)
self.loadMusic(path)
dlg.Destroy()
#----------------------------------------------------------------------
def onNext(self, event):
"""
Not implemented!
"""
pass
#----------------------------------------------------------------------
def onPause(self):
"""
Pauses the music
"""
self.mediaPlayer.Pause()
#----------------------------------------------------------------------
def onPlay(self, event):
"""
Plays the music
"""
if not event.GetIsDown():
self.onPause()
return
if not self.mediaPlayer.Play():
wx.MessageBox("Unable to Play media : Unsupported format?",
"ERROR",
wx.ICON_ERROR | wx.OK)
else:
self.mediaPlayer.SetInitialSize()
self.GetSizer().Layout()
self.playbackSlider.SetRange(0, self.mediaPlayer.Length())
event.Skip()
#----------------------------------------------------------------------
def onPrev(self, event):
"""
Not implemented!
"""
pass
#----------------------------------------------------------------------
def onSeek(self, event):
"""
Seeks the media file according to the amount the slider has
been adjusted.
"""
offset = self.playbackSlider.GetValue()
self.mediaPlayer.Seek(offset)
#----------------------------------------------------------------------
def onSetVolume(self, event):
"""
Sets the volume of the music player
"""
self.currentVolume = self.volumeCtrl.GetValue()
print "setting volume to: %s" % int(self.currentVolume)
self.mediaPlayer.SetVolume(self.currentVolume)
#----------------------------------------------------------------------
def onStop(self, event):
"""
Stops the music and resets the play button
"""
self.mediaPlayer.Stop()
self.playPauseBtn.SetToggle(False)
#----------------------------------------------------------------------
def onTimer(self, event):
"""
Keeps the player slider updated
"""
offset = self.mediaPlayer.Tell()
self.playbackSlider.SetValue(offset)
########################################################################
class MediaFrame(wx.Frame):
#----------------------------------------------------------------------
def __init__(self):
wx.Frame.__init__(self, None, wx.ID_ANY, "Python Music Player")
panel = MediaPanel(self)
#----------------------------------------------------------------------
# Run the program
if __name__ == "__main__":
app = wx.App(False)
frame = MediaFrame()
frame.Show()
app.MainLoop()