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On Wednesday, 06 June 2018 18:54:32 Robbie Joosten wrote: > Right you are Kay. It would be very weird to start developing things on Python 2.7 right now. Its days are numbered: https://pythonclock.org/ I would take a contrarian view. Given the instability of python development, the promise to leave version 2.7 alone makes it more desirable than the current ever-changing version. You can be reasonably sure that anything you write for 2.7 will continue to work, since they won't change the 2.7 infrastructure underneath you. But in truth I would recommend staying away from python for new projects altogether, precisely because it is continually unstable. The python development philosophy places low priority on backwards-compatibility. Combined with the explicit philosophy that python should only support one way of accomplishing any given task, that is a recipe for frequent and continual breakage. Here's an essay from a few years back that I think is still apposite. https://jakevdp.github.io/blog/2013/01/03/will-scientists-ever-move-to-python-3/ Ethan > > > Cheers, > > Robbie > > > > Sent from my Windows 10 phone > > > > ________________________________ > From: CCP4 bulletin board <[log in to unmask]> on behalf of Kay Diederichs <[log in to unmask]> > Sent: Wednesday, June 6, 2018 8:47:07 PM > To: [log in to unmask] > Subject: Re: [ccp4bb] Python3 and MTZ > > Dear Nicolas, > > my (our) motivation is purely that when learning Python today, and developing something from scratch, Python3 appears like the better choice (compared to version 2) - provided that basic crystallographic libraries can be used. > > Just a note (for those whose operating system provides only one of the two Python flavours): RHEL7 has Python2 as system library, but Python3 can be installed in parallel (using "Software Collections"). The user makes a choice by setting the PATH variable. > > best, > > Kay > > On Wed, 6 Jun 2018 15:43:16 +0200, Nicolas FOOS <[log in to unmask]> wrote: > > >Dear Kay, > > > >depending of the motivation to develop in python3 (could be due to an OS > >using python3 by default or you really prefer to work with python3). If > >it's due to the OS, a possible strategy is to use virtualenv > >(https://virtualenv.pypa.io/en/stable/) which let you use python2 even > >if python3 is the default version for the OS. It exist probably other > >method to have a contain installation of python2 with all the library needs. > > > >I used this strategy (virtualenv) to install ccp4 (with the installer > >which needed python2) on a manjaro linux (Arch based) running python3 > >and that works very well. > > > >Nicolas > > > >Nicolas Foos > >PhD > >Structural Biology Group > >European Synchrotron Radiation Facility (E.S.R.F) > >71, avenue des Martyrs > >CS 40220 > >38043 GRENOBLE Cedex 9 > >+33 (0)6 76 88 14 87 > >+33 (0)4 76 88 45 19 > > > >On 06/06/2018 14:25, Kay Diederichs wrote: > >> Dear all, > >> > >> I haven't tried to read MTZ files from Python until now, but for a new > >> project in my lab I'd like to do that - and with Python3. > >> > >> Googling around, it seems that iotbx from cctbx is not (yet) > >> Python3-compatible. > >> > >> So, what are my options? > >> > >> thanks, > >> > >> Kay > > > >######################################################################## > > > >To unsubscribe from the CCP4BB list, click the following link: > >https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 > > ######################################################################## > > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 > > ######################################################################## > > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 -- Ethan A Merritt, Dept of Biochemistry Biomolecular Structure Center, K-428 Health Sciences Bldg MS 357742, University of Washington, Seattle 98195-7742 ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1