pickled文件无法在Mac/Linux上加载

我有一个从pickled文件导入数据的应用程序。它在Windows中工作得很好,但是Mac和Linux的行为很奇怪。

在OS X中,除非将文件类型设置为*.*,否则pickled文件(文件扩展名“.char”)不能作为选择。然后,如果我选择一个扩展名为.char的文件,它将不会加载,并给出错误信息

unpickle_file = cPickle.load(char_file) 

ValueError:无法将字符串转换为float

但是,如果我创建一个没有.char扩展名的文件,那么这个文件就可以加载了。

在Linux中,当我使用“文件打开”对话框时,不管是否有文件扩展名,我的pickled文件都不可见。不过,我可以在鹦鹉螺或海豚下面看到它们。不过,它们在我的应用程序中根本不存在。

编辑 以下是保存代码:

def createSaveFile(self):
        """Create the data files to be saved and save them.

        Creates a tuple comprised of a dictionary of general character information
        and the character's skills dictionary."""
        if self.file_name:
            self.save_data = ({'Name':self.charAttribs.name,

              <snip> 

                self.charAttribs.char_skills_dict)
            self.file = open(self.file_name, 'w')
            cPickle.dump(self.save_data, self.file)
        self.file.close()

以下是开放代码:

 def getCharFile(self, event): # wxGlade: CharSheet.<event_handler>
        """Retrieve pickled character file from disk."""
        wildcard = "Character files (*.char) | *.char | All files (*.*) | *.*"        
        openDialog = wx.FileDialog(None, "Choose a character file", os.getcwd(),
        "", wildcard, wx.OPEN | wx.CHANGE_DIR)
        if openDialog.ShowModal() == wx.ID_OK:
            self.path = openDialog.GetPath()
        try:
            char_file =  open(self.path, "r")
            unpickle_file = cPickle.load(char_file)
            char_data, char_skills = unpickle_file
            self.displayCharacter(char_data, char_skills)
        except IOError:
            self.importError = wx.MessageDialog(self, 
            "The character file is not available!",
            "Character Import Error", wx.OK | wx.ICON_ERROR)
            self.importError.ShowModal()
            self.importError.Destroy()
            openDialog.Destroy()