On 1/2/2014 8:20 PM, Mark Lawrence wrote:
On 03/01/2014 00:57, Gary Herron wrote:
On 01/02/2014 01:44 PM, John Allsup wrote:
The point of my original post was that, whilst C's
if( x = 2 ) { do something }
and
if( x == 2 ) { do something }
are easy to confuse, and a source of bugs, having a construct like
follows:
if x == 2:
do something # what happens at present
if testFunc() as x:
do something with x
using the 'as' syntax that appears with 'with' and 'except', would allow
for the advantages of C style assignments in conditionals but without
the easy confusion, since here the syntax is significantly different
between assignment and equality testing (rather than a character apart
as happens with C).
This occurs further down in my original post (past the point where you
inserted your reply).
Another post suggested a workaround by defining a 'pocket' class, for
which I am grateful.
John
Sorry. I shot off my answer before reading the whole post. That's
never a good idea.
After reading to the end, I rather like your suggestion. It works well
in your example, , nicely avoids the C/C++ trap, and has some
consistency with other parts of Python.
Gary Herron
I liked the look of this as well. It ought to go to python ideas, or
has it been suggested there in the past?
Yes, and rejected (I am quite sure). Consistency would 'demand' at least
"while expr as target" and possibly "for i in iterable_expr as target".
--
Terry Jan Reedy
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