[Tutor] List comprehensions

[Blake Winton]

Kent Johnson wrote:
>>> If you mean for j to be a list of foobar(item) then use
>>> j=[foobar(item) for item in x]
>>> The first part of the list comp can be any valid expression.
>> Does that mean that there are invalid expressions? I'd enjoy seeing an 
>> example.
> I suppose if it's an expression, it must be valid, eh? Otherwise it's 
> something else.

I don't think I entirely agree...  What about "x === item"  It's 
certainly not a statement, and I would wager that Python was in the 
middle of its expression parsing code when it threw the SyntaxError. 
(Or how about "x == item ="?)  Perhaps someone more in touch with the 
compiler internals will chip in here.

It is an interesting philosophical question, though.

Later,
Blake.