Hi Thomas, In general, the PyMOL API should raise pymol.CmdException if things go wrong. But in case of cmd.pair_fit() this wasn't happening (see my fix that I pushed few minutes ago: https://github.com/schrodinger/pymol-open-source/commit/b26d91c40d20344fef511ea9d6bb664a93f1bb4a )
cmd.select() correctly raises an exception, so if you want to make a script more robust against selection failures, you could always create a named selection first to check if it's valid. tmpsele1 = cmd.get_unused_name('_sele1') try: cmd.select(tmpsele1, someexpression, 0) except pymol.CmdException: print('invalid selection') finally: cmd.delete(tmpsele1) Cheers, Thomas > On Feb 22, 2019, at 12:11 PM, Thomas Evangelidis <teva...@gmail.com> wrote: > > Hi Thomas, > > This is great! I can even include more atom types in the selection. > Just for the record, is it possible to catch PyMOL exceptions like > "Selector-Error" from within a Python script? Is there any general strategy > to select which exception type to look for? In the past, I was catching > exceptions from 'tmalign' with "except AssertionError:" which doesn't work > for "Selector-Error". > > Best, > Thomas > > > -- > ====================================================================== > Dr Thomas Evangelidis > Research Scientist > IOCB - Institute of Organic Chemistry and Biochemistry of the Czech Academy > of Sciences > Prague, Czech Republic > & > CEITEC - Central European Institute of Technology > Brno, Czech Republic > > email: teva...@gmail.com > website: https://sites.google.com/site/thomasevangelidishomepage/ -- Thomas Holder PyMOL Principal Developer Schrödinger, Inc. _______________________________________________ PyMOL-users mailing list Archives: http://www.mail-archive.com/pymol-users@lists.sourceforge.net Unsubscribe: https://sourceforge.net/projects/pymol/lists/pymol-users/unsubscribe