Article of interest: Python pros/cons for the enterprise

Paul Rubin http
Sun Feb 24 01:01:42 CET 2008


Nicola Musatti <Nicola.Musatti at gmail.com> writes:
> >>>    a = [f(x) + g(y) for x,y in izip(m1, m2) if h(x,y).frob() == 7]
> [...]
> > There you replace one line of code with 40+ lines to get around the
> > absence of GC.  Sounds bug-prone among other things.
> 
> Come on, you didn't define f, g, izip, h or frob either. It's more
> like 5 to one. Furthermore your code is more compact due to the
> existence of list comprehensions, not because of GC. Had you written a
> loop the difference would be smaller.


No I don't need a loop if I don't use the listcomp.  I could say

  a = map(lambda x,y: f(x)+g(y), ifilter(lambda x,y: h(x,y).frob==7,
                                       izip(m1, m2)))

the listcomp is basically syntax sugar for that.

The issue here is that Python is simply more expressive than C++,
which doesn't support creation of higher order functions like that.
However, one of the consequences of programming in this style is
you allocate a lot of temporary objects which best managed by GC.



More information about the Python-list mailing list