python gripes survey
Ryan Lowe
ryanlowe0 at msn.com
Sun Aug 24 11:42:29 EDT 2003
"Andrew Dalke" <adalke at mindspring.com> wrote in message
news:MOX1b.1042$Jh2.797 at newsread4.news.pas.earthlink.net...
> Ryan Lowe:
> > i was actually more impressed with the union/intersection of lists and
> > dictionaries. why the hell cant you join two dictionaries like you can
two
> > list? the len thing is a pretty minor issue in my mind.
>
> Mostly because there isn't a good reason for what
>
> a = {1: "a"} + {1: "b"}
>
> should be. The most likely solution is
>
> a = {1: "a"}
> a.update({1:"b"})
works for me, but i dont want to argue about it when there is another thread
about this.
>
> However, there is something tricky even here. Watch this:
>
> >>> d = {1: "a"}
> >>> d.update({True: "b"})
> >>> d
> {1: 'b'}
that is weird; i thought 2.3 made bool its own type? but i guess its still a
subtype of int. though, i cant imagine when this would come up in a real
situation anyway.
> Missing language functionality is not the same as missing Python
> functionality. What you're asking is - why do other languages
> exist? Python lacks native support for:
yea, this is what im talking about. maybe you could explain a couple of
these a bit?
> code blocks (like Smalltalk)
is this what it sounds like? do you name a block of code and call it like an
inline function with no parameters?
> macros (like Lisp)
> lazy evaluation (like .. Haskell? One of the functional languages)
i learned and forgot what lazy evaluation was. does it buy you anything
other than speed in certain cases
> rich N-dimensional operators (like APL)
python could do the same with functions or named operators
> symbolic math manipulation (like Mathematica)
this is approaching the limited domain area. plus mathematica spent a LOT of
money and time writing that software. its not something your average
open-sourcer would probably wish to tackle in their spare time. of course,
it would be nice to have a symbolic module :)
> color as part of syntax (like ColorForth)
color meaning built-in? this i have never heard of. how does it work?
> predicate logic (like Prolog)
> literate programming (like WEB -> Pascal/TeX)
> aspect-oriented programming (like AspectJ)
> stack nature (like Postscript (I had Forth here but didn't want a dup
:))
> programming by contract (like Eiffel)
can any of these be explained quickly?
> support for high-performance multiprocessor computing (like Fortran90)
> fixed-point data types, as for money (like REXX)
> control over the memory arenas use by an object (like C++)
> direct access to memory, eg, as for I/O to periphials (like C)
> (some are available as external modules, like FixedPoint, but are
> not native.)
>
> There's easily more - just look at how many languages have
> been invented over the last few decades.
>
> Andrew
> dalke at dalkescientific.com
>
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