腌制的文件不会在Mac/Linux上加载

问题描述

我有一个从腌制文件中导入数据的应用程序.在Windows上可以正常工作，但Mac和Linux的行为很奇怪.

I have an application that imports data from a pickled file. It works just fine in Windows but Mac and Linux behaviour is odd.

在OS X中，除非将文件类型设置为*.*，否则腌制的文件(文件扩展名".char")不可用.然后，如果我选择了扩展名为.char的文件，它将无法加载，并显示错误消息

In OS X, the pickled file (file extension ".char") is unavailable as a selection unless I set the file type to *.*. Then, if I select a file that has the .char extension, it won't load, giving the error

unpickle_file = cPickle.load(char_file)

ValueError:无法将字符串转换为浮点数

ValueError: could not convert string to float

但是，如果我创建的文件没有.char扩展名，则该文件将正常加载.

However, if I create a file that doesn't have the .char extension, that file will load up just fine.

在Linux中，当我使用文件打开"对话框时，无论它们是否具有文件扩展名，腌制的文件都不可见.但是，我可以在Nautilus或Dolphin下看到它们.但是，它们根本不存在于我的应用程序中.

In Linux, when I use the "file open" dialog, my pickled files aren't visible, whether or not they have a file extension. However, I can see them under Nautilus or Dolphin. They simply don't exist to my application though.

编辑:这是保存代码:

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()

这是公开代码:

 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()

推荐答案

在写入和/或读取腌制数据时，可能没有以二进制模式打开文件.在这种情况下，将进行换行格式转换，这可能会破坏二进制数据.

Probably you didn't open the file in binary mode when writing and/or reading the pickled data. In this case newline format conversion will occur, which can break the binary data.

要以二进制模式打开文件，您必须在模式字符串中提供"b":

To open a file in binary mode you have to provide "b" as part of the mode string:

char_file = open('pickle.char', 'rb')

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