Is it really good?
LogiplexSoftware at earthlink.net
Wed Jan 8 01:50:38 CET 2003
On Tue, 2003-01-07 at 15:43, Skip Montanaro wrote:
> Nadav> Can someone explain why python does not raise NameError in the
> Nadav> first test line b[e]low.
> >>> 2 == 3 is good
> 0 # ????????????????????????
> Chained operations. The above expression is effectively
> (2 == 3) and (3 is good)
This confuses me. What is the order of operation for '==' and 'is'?
Even if == is evaluated first, the equivalent would be:
(2 == 3) is good
if 'is' is higher then it becomes
2 == (3 is good)
How can (2 == 3) and (3 is good) be a possible equivalence?
> The first is false, so the second is never evaluated.
That was my first thought, but I can't see how it works.
Cliff Wells, Software Engineer
Logiplex Corporation (www.logiplex.net)
(503) 978-6726 x308 (800) 735-0555 x308
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