Home/ Questions/Q 74017
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-10T20:17:32+00:00

I have an application that imports data from a pickled file. It works just

  • 0

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

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: could not convert string to float

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

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.

Edit Here’s the save code:

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()

Here’s the open code:

 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()
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. 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.

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

    char_file = open('pickle.char', 'rb')
    • 0