Hi,
Suppose I write
if x in ("abc", "def", "xyz"):
doStuff()
elif x in ("pqr", "tuv", "123"):
doOtherStuff()
elif ...
etc.
When is python building the tuples? Does it need to build the tuple
every time it comes through this code? Or does it somehow recognise
that they are constant and cache them?
In other words, is anything gained (efficiency-wise) by first putting
say
tuple1 = ("abc", "def", "xyz")
tuple2 = ("pqr", "tuv", "123")
somewhere where I know it's executed once, and then writing
if x in tuple1:
doStuff()
elif x in tuple2:
doOtherStuff()
elif ...
????
(The tuples I have in mind are of course much longer than three
elements)
Many thanks
David
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