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Dear Kay, I’m even more biased that Graeme of course, but I agree completely with what he says. You can write code that is compatible with both 2.7 and 3 and easily make use of the libraries available. Cctbx, and Phenix, are moving to python 3 compatibility in the not so distant future. Cheers, Paul > On Jun 6, 2018, at 4:22 PM, [log in to unmask] <[log in to unmask]> wrote: > > Dear Kay, > > > While I am obviously biased, I have to say that using cctbx (even if it is "old" Python) has a lot to be said for it - there are a lot of tools in there which are useful once you have read the reflection data & want to do crystallography. > > > Re: Python 3: within xia2, DIALS and other cctbx-derived projects we have moved to writing Python which is compatible with 2.7.x and 3.x language standards - by and large it is not a hardship and means you can write code today which will continue to be useful. There is a wider push to migrate cctbx to 2.7.x and 3.x compatibility however it is a large code base and it's a fair amount of work. There's more to it than just adding brackets after print though :-) > > > Best wishes Graeme > > ________________________________ > From: CCP4 bulletin board <[log in to unmask]> on behalf of Kay Diederichs <[log in to unmask]> > Sent: 06 June 2018 19:47:07 > To: ccp4bb > 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 > > -- > This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail. > Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd. > Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message. > Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom > > > ######################################################################## > > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 -- Paul Adams Division Director, Molecular Biophysics & Integrated Bioimaging, Lawrence Berkeley Lab Division Deputy for Biosciences, Advanced Light Source, Lawrence Berkeley Lab Adjunct Professor, Department of Bioengineering, U.C. Berkeley Vice President for Technology, the Joint BioEnergy Institute Laboratory Research Manager, ENIGMA Science Focus Area Building 33, Room 347 Building 978, Room 4126 Tel: 1-510-486-4225, Fax: 1-510-486-5909 http://cci.lbl.gov/paul Lawrence Berkeley Laboratory 1 Cyclotron Road BLDG 33R0345 Berkeley, CA 94720, USA. Executive Assistant: Louise Benvenue [ [log in to unmask] ][ 1-510-495-2506 ] -- ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1