spir wrote:
numbers if x%2==1] that confusingly repeats the item. Would there be any parsing issue if we let down "<expression> for" when it does nothing?
Yes, there's a parsing problem: "x in numbers" is a containment test "x in numbers if cond else whatever" is a containment test combined with a conditional expression "x for x in numbers" and "x for x in numbers if cond" are genexps/comprehensions (depending on the kind of brackets you put around them, if any) "x in number if cond" is none of the above, but the parser can't tell it isn't meant to be the second one and hence will choke on the missing "else":
1 in [] if True File "<stdin>", line 1 1 in [] if True ^ SyntaxError: invalid syntax 1 in [] if True else None False
Cheers, Nick. -- Nick Coghlan | ncoghlan@gmail.com | Brisbane, Australia ---------------------------------------------------------------