On 25/09/06, Angus McMorland <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> Can someone explain why the following occurs?
>
> a = numpy.zeros((100))
> b = numpy.ones((10))
> a[20:30] = b # okay
> eval('a[50:60] = b') # raises SyntaxError: invalid syntax
>
> Is there some line mangling that the interpretor does that eval doesn't do?
No. Eval evaluates expressions, that is, formulas producing a value.
"a=b" does not produce a value, so you are obtaining the same error
you would if you'd written
if a=b:
...
The way you run code that doesn't return a value is with "exec".
A. M. Archibald
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