On 2 May 2013 13:55, Chris Angelico <ros...@gmail.com> wrote: > On Thu, May 2, 2013 at 10:52 PM, Oscar Benjamin > <oscar.j.benja...@gmail.com> wrote: >> They are all easy to write as generator functions but to me the point >> of itertools is that you can do things more efficiently than a >> generator function. Otherwise code that uses a combination of >> itertools primitives is usually harder to understand than an >> equivalent generator function so I'd probably avoid using itertools. > > Aren't most of the itertools primitives written in Python anyway? If > your code is harder to understand, just write the generator function!
The documentation describes them by showing equivalent generator functions and there may be a pure Python version of the module but if you look here then you can see which are builtin for CPython: http://hg.python.org/cpython/file/c3656dca65e7/Modules/itertoolsmodule.c#l4070 The list covers all of the documented itertools functions (actually I now realise that they're mostly types not functions). Oscar -- http://mail.python.org/mailman/listinfo/python-list
