How to save a binary file?

hidura at gmail.com hidura at gmail.com
Wed Oct 6 06:53:31 CEST 2010


I has to use repr to convert in this string: ÿØÿà\x00\x10JFIF?

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:

> [snip]



> Sorry for the last send.

> > 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()

> > >

> > >

> > >

> > >

> > > So where's the problem? That code should work. Anyway, you want to

> have a look at with-statements.

> > >


> 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.

> --

> http://mail.python.org/mailman/listinfo/python-list

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