Nick Coghlan wrote: > I have a different suggestion for this. > > 'as' is used for renaming in import statements. 'as' will be used for exception > naming in Python 3k. > > So let's use it for expression naming in 'if' statements, too. > > if someregexp.match(s) as m: > # blah using m > elif someotherregexp.match(s) as m: > # blah using m
What if the condition you wanted to test wasn't the same as the thing you want to save? In other words, how would you convert this? . where: . m = something() . if m > 20: . do_something_with(m) What you propose works for typical regexps idiom but not for the slightly more general case. However, I could see why some people might not like the where...if syntax I proposed; it's kind of choppy and not exactly easy to follow at a first glance. As a compromise, howabout: . if m > 20 where m=something(): . do_something_with(m) In this case, the m=something() is NOT an assignment statement, but merely a syntax resembling it. The "where m=something()" is part of the if-statement, not the if-expression. It causes m to be visisble in the if-expression and the if-block. It (or your suggestion) could work with a while-loop too. . while line where line=f.readline(): . do_something_with(line) The main problem here (as some would see it) is that you can't do something this: . if m > 20 where (def m(): a(); b()): -- CARL BANKS -- http://mail.python.org/mailman/listinfo/python-list
