On Jan 24, 4:20 pm, Tim Golden <[EMAIL PROTECTED]> wrote: > [Tim Golden] > > > > >> wxPython is trying to interpret your byte stream as a Unicode > >> text stream encoded as cp1252. But it's not, so it gives up > >> in a heap. One solution is to pass the repr of file_content. > >> Another solution is for you to prefilter the text, replacing > >> non-printables by their hex value or by some marker. Not much > >> in it, really. > > >> <code> > >> import random > >> file_content = "".join ( > >> chr (random.randint (0, 255)) for i in range (1000) > >> ) > >> munged_text = "".join ( > >> c if 32 <= ord (c) <= 126 else hex (ord (c)) for c in file_content > >> ) > > >> print repr (file_content) > >> print munged_text > >> </code> > > >> TJG > > [joe jacob] > > > If I open an exe file in notepad, I can see some junk characters. I'm > > trying to develop a program like an editor which can encrypt a file > > opened by it. I need to open files like exe or jpeg etc in the editor > > and after encryption the encrypted data should be displayed in the > > editor. I developed the editor but when I tried to open an windows exe > > file in it I am getting the above mentioned error as the characters > > contained in it are non unicode. > > Hi, Joe. I've copied this back to the list (and I encourage you to > do the same when replying) since the more people see the issue, > the more chances you've got of a useful answer! > > To try to address what you're saying here: notepad.exe makes some > choice or other when confronted by the byte stream in a file which > you open. I don't know what that choice is, or how it tries to cope > with encoded unicode text, but whatever it does by the choice of > its developers. The "some junk characters" are one of several > possible representations of the not-ordinary-characters which your > file contains. > > If you're writing your own editor or file display, you have to make > similar choices, which includes understanding what possibilities are > offered by the toolset you're employing -- in this case, wxPython. > > <slight guesswork - I haven't checked the source> > The wxPython wx.TextCtrl expects to be fed with Unicode text. If > you pass it a string instead, it tries to decode it according to > the system's default encoding, here cp1252. If it can't, it doesn't > display "junk characters": it just gives an error. > </slight guesswork> > > If you want junk characters, then you'll either have to explicitly > pass in the characters you want displayed or do the kind of thing > I suggested above to indicate their hex value, or find another > control (or an option of the wx.TextCtrl) which will attempt to do > the work for you when displaying raw bytes. > > I'm afraid I'm not a wxPython expert so maybe someone else has > suggestions. But the most important thing is that you understand > what's happening here and why you can't just say "I want it to > do what Notepad does". > > TJG
Thanks for the information. I'll try to manage it some how. -- http://mail.python.org/mailman/listinfo/python-list
