On 10/29/2012 06:52 AM, Roy Smith wrote:
Show me an example where someone would write a slice with a negative and
a positive index (both in the same slice);
and have that slice grab a contiguous slice in the *middle* of the list
with orientation of lower index to greater index.
It's possible in bioinformatics. ...
eq[100:-100].
I decided to go to bed... I was starting to write very badly worded
responses. :)
Thanks, Roy, what you have just shown is another example that agrees
with what I am trying to do.
FYI: I was asking for a reason why Python's present implementation is
desirable...
I wonder, for example:
Given an arbitrary list:
a=[1,2,3,4,5,6,7,8,9,10,11,12]
Why would someone *want* to do:
a[-7,10]
Instead of saying
a[5:10] or a[-7:-2] ?
eg:
What algorithm would naturally *desire* the default behavior of slicing
when using *mixed* negative and positive indexes?
In the case of a bacterial circular DNA/RNA ring, asking for codons[
-10: 10 ] would logically desire codon[-10:] + codon[:10] not an empty
list, right?
I think your example is a very reasonable thing the scientific community
would want to do with Python.
:)
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