Where is builtins module located

Question

I checked in all the directories listed in sys.path but I couldn't find any builtins.py file. Where do I find this?

Answer 1

The module is built-in to the python interpreter.

>>> import builtins
>>> builtins
<module 'builtins' (built-in)>
>>> import sys
>>> sys
<module 'sys' (built-in)>

Such modules are represented with (built-in) as you can see in the above interactive session.

If the module is loaded from a file, it will be represented as follow:

>>> import ftplib
>>> ftplib
<module 'ftplib' from 'C:\\Python34\\lib\\ftplib.py'>