condition of tuple of integers

Question

how do I write a concise/neat boolean condition to test if all the integers in a tuple are in a given range? Something like

0 < (1,2,3) < 50

would be perfect - of course that doesn't work because it uses lexicographical ordering, so also

0 < (1,2,-3) < 50

evaluates to True. Instead I would want it to evaluate to True if and only if all the numbers are in the range.

score 15 · Accepted Answer · answered Apr 22 '11 at 16:20

15

all(0 < n < 50 for n in thetuple)

should be a relatively concise solution. it may not be the shortest piece of code, but it is almost self-documenting.

answered Apr 22 '11 at 16:20

Alexander Gessler

1

And the inner parens are optional (I'd drop them). – Apr 22 '11 at 16:22
Try `all(0 < n < 50 for n in (1,2,-3))` and see what happens . . . – JoshAdel Apr 22 '11 at 16:26
@JoshAdel It returns False as expected no? – Xavier Combelle Apr 22 '11 at 16:30
(I did check with Python 2.6 and Python 3.1 - I hope I'm not misreading the question, if so please point out what I got wrong) – Alexander Gessler Apr 22 '11 at 16:33
What's supposed to - it returns False. – Matt Luongo Apr 22 '11 at 16:34
@Xavier and @Alexander: grrr. . . forgot I was working in pylab that does a `from pylab import *` call at startup and uses `numpy.all` instead of the python built-in. Namespaces are a good idea. . .My apologies. . . You have my +1 now. . . – JoshAdel Apr 22 '11 at 16:35
@JoshAdel: Namespaces are one honking great idea! ;-) – pillmuncher Apr 22 '11 at 16:50
@Alexander: thanks, that's perfect and makes me learn a new python construct – nareto Apr 22 '11 at 17:04

1 Answers1