Russell E. Owen wrote:
In article <d28975e8-6706-4515-9c9e-fb7f90775...@masklinn.net>,
Xavier Morel <catch-...@masklinn.net> wrote:
On 6 Aug 2009, at 00:22 , Jeff McAninch wrote:
I'm new to this list, so please excuse me if this topic has been
discussed, but I didn't
see anything similar in the archives.
I very often want something like a try-except conditional expression
similar
to the if-else conditional.
I fear this idea is soon going to extend to all compound statements
one by one.
Wouldn't it be smarter to fix the issue once and for all by looking
into making Python's compound statements (or even all statements
without restrictions) expressions that can return values in the first
place? Now I don't know if it's actually possible, but if it is the
problem becomes solved not just for try:except: (and twice so for
if:else:) but also for while:, for: (though that one's already served
pretty well by comprehensions) and with:.
I like this idea a lot.
For some reason this kind of reminds me of BCPL.
A function definition looked like:
LET func_name(arg1, arg2) = expression
so, strictly speaking, no multiline functions.
However, there was also the VALOF ... RESULTIS ... block.
In Python, the 'return' statement provides the result of a function; in
BCPL, the 'RESULTIS' statement provided the result of the VALOF block,
which was call from within an expression, like:
LET foo(...) = VALOF
$(
...
RESULTIS expression
$)
_______________________________________________
Python-Dev mailing list
Python-Dev@python.org
http://mail.python.org/mailman/listinfo/python-dev
Unsubscribe:
http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
