python newbie question

[Donn Cave]

Quoth donmalla at yahoo.co.in:
...
| However when I try to manipulate the list , using for loop like this :
|
| [3*x for x in vec]
|
| I get a syntax error "invalid syntax"
|
| Please help me. I am using Python 1.5 on Windows 2000.

If you need this to work, you will have to upgrade to a
more current version of Python.  In 1.5 there are no list
incomprehensions, so it's either

    a = []
    for x in vec:
        a.append(3 * x)

 or
    a = map(lambda x: 3 * x, vec)

 ("lambda x: 3 * x" is an anonymous function, not otherwise very
 useful in Python;  map is generally  map(fn, seq[, ...]) where
 fn accepts 1 parameter per seq, and it's usually easier and
 more readable to define an ordinary function.  Hope "lambda"
 is the only thing Greek about this.)

	Donn Cave, donn at u.washington.edu