Reading a binary file and wrtiting the bytes verbatim in an utf-8 file
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From: Chris Rebert on 23 Apr 2010 12:48 On Fri, Apr 23, 2010 at 9:22 AM, <fab(a)slick.airforce-one.org> wrote: > I have to read the contents of a binary file (a PNG file exactly), and > dump it into an RTF file. > > The RTF-file has been opened with codecs.open in utf-8 mode. > > As I expected, the utf-8 decoder You mean encoder. > chokes on some combinations of bits; Well yeah, it's supposed to be getting *characters*, not bytes. > how can I tell python to dump the bytes as they are, without > interpreting them? Go around the encoder and write bytes directly to the file: # Disclaimer: Completely untested import codecs raw_rtf = open("path/to/rtf.rtf", 'w') png = open("path/to/png.png", 'r') writer_factory = codecs.getwriter('utf-8') encoded_rtf = writer_factory(raw_rtf) encoded_rtf.write(u"whatever text we want") # use unicode # ...write more text... # flush buffers encoded_rtf.reset() raw_rtf.flush() raw_rtf.write(png.read()) # write from bytes to bytes raw_rtf.close() #END code I have no idea how you'd go about reading the contents of such a file in a sensible way. Cheers, Chris -- http://blog.rebertia.com
From: Chris Rebert on 23 Apr 2010 12:50
On Fri, Apr 23, 2010 at 9:48 AM, Chris Rebert <clp2(a)rebertia.com> wrote: > On Fri, Apr 23, 2010 at 9:22 AM, Â <fab(a)slick.airforce-one.org> wrote: >> I have to read the contents of a binary file (a PNG file exactly), and >> dump it into an RTF file. <snip> >> how can I tell python to dump the bytes as they are, without >> interpreting them? > > Go around the encoder and write bytes directly to the file: > > # Disclaimer: Completely untested <snip> > encoded_rtf.write(u"whatever text we want") # use unicode Erm, sorry, since you're apparently using Python 3.x, that line should have been just: encoded_rtf.write("whatever text we want") # use unicode Cheers, Chris -- http://blog.rebertia.com |