How to convert uint64 in C into Python 32bit Object [ I am using Python2.2 ]

[Explore_Imagination]

On Dec 11, 4:45 am, John Machin <sjmac... at lexicon.net> wrote:
> On Dec 11, 9:49 am, Explore_Imagination <Mr.HassanShab... at gmail.com>
> wrote:
>
> > Hi all
>
> > I am new to C and python ... I want to convert C data type uint64
> > variable into the Python 32bit Object. I am currently using Python 2.2
> > [ It is necessary to use it ]
>
> > Kindly give your suggestion how and in which way I can achieve this
> > task.
>
> I'm not sure what you mean by "the Python 32bit Object". A Python int
> object holds a signed 32-bit integer. A Python long object holds a
> signed integer of arbitrary size. You will need to convert your uint64
> into a Python long; then, if necessary, check that the result will fit
> in an int (result <= sys.maxint).
>
> If the "C variable" is in an 8-byte string that you have read from a
> file, the unpack function in the struct module will do the job.
> Assuming your computer is little-endian:
>
> >>> maxu64 = '\xff' * 8 # example input string
> >>> import struct
> >>> result = struct.unpack('<Q', maxu64)[0]
> >>> result
>
> 18446744073709551615L>>> 2 ** 64 - 1
>
> 18446744073709551615L
>
> If however you mean that in C code you need to build a Python object
> to pass over to Python code: According to the Python/C API Reference
> Manual (http://www.python.org/doc/2.2.3/api/longObjects.html):
>
> PyObject* PyLong_FromUnsignedLongLong(unsigned long long v)
>     Return value: New reference.
>     Returns a new PyLongObject object from a C unsigned long long, or
> NULL on failure.
>
> If however you mean something else, ....
>
> HTH,
> John

Thanks for your feedback ... Actually I want to pass unit64 variable
in C to python
but at the same time I want to have a generic code which should work
on both little-endian
and big endian architectures

Any suggestions ?