How to save a binary file?
hidura at gmail.com
hidura at gmail.com
Wed Oct 6 10:25:57 EDT 2010
When you put the 'wb' extension you have to pass a Encode the string Python
does not accept a string on a wb file, Python3
On Oct 6, 2010 1:01am, Chris Rebert <clp2 at rebertia.com> wrote:
> > On Oct 5, 2010 8:03pm, MRAB python at mrabarnett.plus.com> wrote:
> >> On 05/10/2010 23:50, hidura at gmail.com wrote:
> >> I did but the mistake is: Error interpreting JPEG image file (Not a
> JPEG
> >> file: starts with 0x5c 0x6e)
> >>
> >> I think the problem is maybe in the binary code here is:
> >> > On Oct 5, 2010 6:18pm, "Jonas H." jonas at lophus.org> wrote:
> >> > > On 10/05/2010 11:11 PM, hidura at gmail.com wrote:
> >> > > Hello, how i can save a binary file, i read in the manual in the IO
> >> area
> >> > > but doesn' t show how to save it.
> >>
> >> > > Here is the code what i am using:
> >> > > s = open('/home/hidura/test.jpeg', 'wb')
> >> > > s.write(str.encode(formFields[5]))
> >> > > s.close()
> >> Why are you encoding it? A JPEG file should contain the binary data,
> >> not a textual encoding of its bytes. The error message you got said
> >> that the contents of the file started with a backslash.
> >>
> >> If you print out, say, repr(str[ : 10]) you should get something like
> >>
> >> 'ÿØÿà\x00\x10JFIF'.
> >>
> >> Try this instead:
> >>
> >> s = open('/home/hidura/test.jpeg', 'wb')
> >> s.write(str)
> >> s.close()
> >>
> >> Incidentally, 'str' is a bad name for a variable because it's the name
> >> of the built-in string type.
> On Tue, Oct 5, 2010 at 9:53 PM, hidura at gmail.com> wrote:
> > I has to use repr to convert in this string: ÿØÿà\x00\x10JFIF?
> No, you don't/shouldn't convert it at all. Read/use the 3 lines of
> suggested code that MRAB gave:
> s = open('/home/hidura/test.jpeg', 'wb')
> s.write(str)
> s.close()
> Cheers,
> Chris
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