I guess that Serhiy is looking for these variables defined in pyconfig.h:
---
/* Define if C doubles are 64-bit IEEE 754 binary format, stored in ARM
   mixed-endian order (byte order 45670123) */
#undef DOUBLE_IS_ARM_MIXED_ENDIAN_IEEE754

/* Define if C doubles are 64-bit IEEE 754 binary format, stored with the most
   significant byte first */
#undef DOUBLE_IS_BIG_ENDIAN_IEEE754

/* Define if C doubles are 64-bit IEEE 754 binary format, stored with the
   least significant byte first */
#undef DOUBLE_IS_LITTLE_ENDIAN_IEEE754
---

On Fedora, pyconfig.h is installed into /usr/include/python2.7/pyconfig.h. This file doesn't contain any sensitive information, it is the configuration used to build Python.

On Fedora, this file only dispatches between pyconfig-32.h and pyconfig-64.h:
---
$ cat /usr/include/python2.7/pyconfig.h 
#include <bits/wordsize.h>

#if __WORDSIZE == 32
#include "pyconfig-32.h"
#elif __WORDSIZE == 64
#include "pyconfig-64.h"
#else
#error "Unknown word size"
#endif
---

My system is 64-bit, so I can use pyconfig-64.h:
---
$ grep IEEE /usr/include/python2.7/pyconfig-64.h 
/* Define if C doubles are 64-bit IEEE 754 binary format, stored in ARM
/* #undef DOUBLE_IS_ARM_MIXED_ENDIAN_IEEE754 */
/* Define if C doubles are 64-bit IEEE 754 binary format, stored with the most
/* #undef DOUBLE_IS_BIG_ENDIAN_IEEE754 */
/* Define if C doubles are 64-bit IEEE 754 binary format, stored with the
#define DOUBLE_IS_LITTLE_ENDIAN_IEEE754 1
/* #undef HAVE_IEEEFP_H */
/* #undef HAVE_LIBIEEE */
/* Define to activate features from IEEE Stds 1003.1-2001 */
---