[EMAIL PROTECTED] wrote:
>>>> a,b=3,4
>>>> x="a+b"
>>>> eval(x)
> 7
>>>> y="x+a"
>
> Now I want to evaluate y by substituting for the evaluated value of x.
> eval(y) will try to add "a+b" to 3 and return an error. I could do
> this,
>>>> eval(y.replace("x",str(eval(x))))
> 10
>
> but this becomes unwieldy if I have
>>>> w="y*b"
> and so on, because the replacements have to be done in exactly the
> right order. Is there a better way?
instead of
x = "a+b"
do
x = "a+b"
x = eval(x)
or
x = eval("a+b")
(I'm afraid I don't really understand the point of your examples; what
is it you're really trying to do here ?)
</F>
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