Re: [PyMOL] Problem with 'byring' selection

Hi Vijay, All "by" operators have a weak priority. This means the following two expressions are equivalent: elem S & byring all w. 4 of elem O elem S & byring (all w. 4 of elem O) This is a bit unfortunate, I agree that it is not very intuitive. I would actually expect the highest priority.

Re: [PyMOL] Problem with 'byring' selection

Dear Tsjerk and Thomas For the following small molecule: ClC1[OH+]C(Cl)=CN=C1C(=O)N([NH+]1CCC(SC1)F)CCN As you advised to use following logic for selecting nitrogen atoms of rings exclusively. abc=cmd.select('elem N and byring not elem N') Likewise, to select Sulphur atoms which are part of rings

Re: [PyMOL] [External] Unable to initialize plugin annocryst

Hi Jon, As far as I see, you're running Open-Souce PyMOL on some unix system. I suggest you install "idle" on the system, e.g. if this is Ubuntu, install https://packages.ubuntu.com/xenial/idle-python2.7 Cheers, Thomas > On Jun 2, 2017, at 7:30 PM, Luo, Jonathan Z.