BC uses 1.5.2 and I don't really remember python.org offering binary builds for 64bits in those days (Python 1.5.2 was already kinda old, even for then).
A lot of newer features aren't possible in BC, and nevermind trying to use 3.0, for example, for-comprehensions aren't possible in 1.5.2, nor generators/co-routines. Then there are a lot of unicode/text handling that are different.
TBH, there isn't really a reason to have a Python installation for BC modding, unless you want to do AI scripting, then the AIEditor might be nice to use.
Personally I use notepad2, which offers some colouring, but I've also programmed in PFE, which is better than notepad, but didn't offer colouring.