Hi all,

Quick update on the "ignore_case" issue:

- ignore_case=on default restored in PyMOL 1.8.0.5 and latest SVN
- latest SVN introduces new "ignore_case_chain" setting

Cheers,
  Thomas

On 02 Feb 2016, at 14:38, Thomas Holder <thomas.hol...@schrodinger.com> wrote:

> Greetings,
> 
> I like to let you know that we plan another change for the "ignore_case" 
> setting behavior. We want to restore the old default (ignore_case=on) and 
> introduce a new setting "ignore_case_chain=off", which will affect the 
> "chain" and "segi" identifiers.
> 
> As you may (or should) know, we changed the default of the "ignore_case" 
> setting in PyMOL 1.8 from "on" to "off". The rationale was to have default 
> settings which properly support PDB files which mix upper and lower case 
> chain identifiers (e.g. 3a0b). Users who still prefer a case insensitive 
> selection language can put a "set ignore_case" line in their pymolrc file.
> 
> However, we now realized that this is not very practical. One reason is that 
> too many scripts and code samples use lower case resn and name selections, 
> fixing those historic resources is often not feasible or desirable. Another 
> reason is that PyMOL inconsistently stores element symbols, for example 
> chlorine is "CL" when loaded from a PDB file, but "Cl" when loaded from SDF. 
> The logical conclusion is that PyMOL should handle chain and segi different 
> from resn, name and elem.
> 
> See also: http://pymolwiki.org/index.php/ignore_case
> 
> Any kind of feedback regarding the planned change will be appreciated.
> 
> Cheers,
>  Thomas

-- 
Thomas Holder
PyMOL Principal Developer
Schrödinger, Inc.


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