Python 64 bit? What does "on win32" mean? [duplicate]

Question

What does the line that's displayed when you start an instance of the Python interpreter mean?

Python 2.7 (r27:82525, Jul  4 2010, 07:43:08) [MSC v.1500 64 bit (AMD64)] on win32

So I know I have Python 2.7, but what about the rest?

Especially confusing to me are the 64 bit (AMD64) on win32 and r27:82525 sections.

Answer 1

That line you see indicates how the python interpreter was built. Breaking it down:

Python 2.7                        -- Python version
(r27:82525, Jul 4 2010, 07:43:08) -- The build date and revision from src trunk 
                                     that was used to build this.
[MSC v.1500 64 bit (AMD64)]       -- Compiled with MSVC compiler targeting 64-bit
on win32                          -- All Windows platforms (64- and 32-bit)

Answer 2

r27: revision 27

82525: build 82525

Jul 4 2010, 07:43:08: when your python binary was built

MSC v.1500: compiled with 64w-bit VC++ 2008

win32: you are using windows

It has also been asked before.