Hi, I apologize. I didn't expect a quick reply.
Here are the outputs you requested.

root@host:~# python
Python 2.7.3 (default, Apr  3 2016, 22:31:30)
[GCC 4.8.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import math
>>> print math.sqrt(2.0)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: math domain error
>>> print math
<module 'math' from '/usr/lib/python2.7/lib-dynload/math.so'>
>>> import struct
>>> struct.pack('<d', 2.0)
'\x00\x00\x00\x00\x00\x00\x00@'
>>>