So eventually I tried this
C:\code\hg-repos\reportlab>\python36\python
-c"s='0123456789';print(repr(s[-5:15]))"
'56789'
C:\code\hg-repos\reportlab>\python36\python
-c"s='0123456789';print(repr(s[-6:15]))"
'456789'
and the light dawned :) seems the negative indexes rules apply to both
On 20/03/2018 14:21, Robin Becker wrote:
I don't know how I never came across this before, but there's a curious
asymmetry in the way ranges are limited
Python 3.6.0 (v3.6.0:41df79263a11, Dec 23 2016, 08:06:12) [MSC v.1900 64 bit
(AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> s = '0123456789'
>>> print(repr(s[-5:5]))
''
>>> print(repr(s[5:15]))
'56789'
>>>
why is the underflow start index treated so differently from the limit index overflow? I suppose there must be some reason, but it
eludes me.
--
Robin Becker
--
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