464. bytes2words -- python script

This script does something I could easily do myself in e.g. bc, and so is a bit of a waste of time. However, because I enjoy writing short python scripts, I did it anyway.

Usage:

/bytes2words -i 8gib -o MW

Input: 8gib
Output: mw
Assuming 64 bit word size
Result: 8 gib  is 1073 mw

bytes2words:

#!/usr/bin/python
# Converts bytes to words
# The impetus comes from the use of MW as the default memory unit in many computational pieces of software.

import sys

def split_text(s): # from http://stackoverflow.com/questions/12409894
    from itertools import groupby
    for k,g in groupby(s, str.isalpha):
        yield ''.join(list(g))

def getargs(arguments):
 switches={}

 version='0.1'
 
 try:
  if "-i" in arguments:
   switches['i']=arguments[arguments.index('-i')+1]
   print 'Input: %s'% switches['i']

   inputted=list(split_text(switches['i']))
   
   if len(inputted)>1:
    switches['i']=inputted[0]
    switches['unit']=inputted[len(inputted)-1].lower()
    
    if switches['unit'] == 'kib':
     switches['if']=1024
    elif switches['unit'] == 'kb':
     switches['if']=1000
    elif switches['unit'] == 'mb':
     switches['if']=1000*1000
    elif switches['unit'] == 'mib':
     switches['if']=1024*1024
    elif switches['unit'] == 'gb':
     switches['if']=1000*1000*1000
    elif switches['unit'] == 'gib':
     switches['if']=1024*1024*1024
   else:
    switches['if']=1
   
   if len(inputted)>2:
    print 'Illegal input: %s'% inputted
    arguments="--help" 
  else:
   arguments="--help";
 except:
  arguments="--help";
  
 try:
  if "-o" in arguments:
   switches['o']=arguments[arguments.index('-o')+1].lower()
   print 'Output: %s'% switches['o']
   if switches['o'] == 'w':
    switches['of']=1
   elif switches['o'] == 'kiw':
    switches['of']=1024
   elif switches['o'] == 'kw':
    switches['of']=1000
   elif switches['o'] == 'mw':
    switches['of']=1000*1000
   elif switches['o'] == 'miw':
    switches['of']=1024*1024
   elif switches['o'] == 'gw':
    switches['of']=1000*1000*1000
   elif switches['o'] == 'giw':
    switches['of']=1024*1024*1024
   else:
    print 'illegal output argument' % switches['o']
  else:
   arguments="--help";
 except:
  arguments="--help";
 version='0.1'

 try:
  if "-b" in arguments:
   switches['b']=int(arguments[arguments.index('-b')+1])
   print 'Word size: %i bits'% switches['b']
  else:
   print 'Assuming 64 bit word size'
   switches['b']=64;
 except:
  switches['b']=64;

 doexit=0
 try:
  if ("-h" in arguments) or ("--help" in arguments):
   print '\t\t bytes2words version %s' % version
   print ' \t-i\t input in words with units, e.g. 200kb'
   print ' \t-o\t output unit (w,kw,mw,gw)'
   print ' \t-b\t word size (32 or 64 (bit))'
   print 'Exiting'
   doexit=1
 except:
  a=0 # do nothing
 if doexit==1:
  sys.exit(0)
 return switches
 
if __name__=="__main__":
 bitsperbyte=8
 arguments=sys.argv[1:len(sys.argv)]
 switches=getargs(arguments)
 
 print 'Result: %s %s  is %s %s' % ( (switches['i']),switches['unit'],int(switches['if']*(float(switches['i'])/float(switches['b']/bitsperbyte))/float(switches['of'])),switches['o'])
 

463. Very Briefly: Installing ia32-libs

Since the skype and bankid posts on this blog rely on ia32-libs, and the question has popped up a few times:

To install ia32-libs on debian wheezy and up you need to enable multiarch:

sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install ia32-libs

462. Olex2 (1.1) on Debian

Olex2 is an open-source program for solving and refining crystal structures. I am not a crystallographer -- I have never (successfully= publication quality output) solved a crystal structure in my life -- and I have no idea whether Olex2 is an alternative or a complement to SHELX.

What I do now is that Olex2 is more of a point-and-click type program with a snazzy GUI, and so it would seem that the learning curve may be shallower than that of SHELX. However, as always you must always be cautious when doing science -- just because it's easy to do, doesn't mean that you're doing it right (I'm looking at you, biologists/physicians/social scientists using statistical software).

But maybe Olex2 makes getting started just easy enough that you can slowly work your way towards actually slowly get to the point where you know and understand what you are doing?

That's my hope anyway.

Quick note: there's no source code on the http://www.olex2.org/ website. However, there's a sourceforge SVN repository: http://sourceforge.net/projects/olex2/

Ideally I should show you how to download and compile and make a .deb package from the source, but sadly I haven't managed to figure it out (I'll add troubleshooting data to this post later). I even tried using the deb rules by http://jupiter.plymouth.edu/~jsduncan/software/olex2.php (again, I might add troubleshooting data later)

Anyway, using the pre-built binaries is easy enough. Only the older version 1.1 seems to be working ok on Debian Wheezy.

Installation:
Note that I've generated a list of dependencies the lazy way -- by looking at the ldd output.

Anyway.

You'll need a raft of libraries, including libGL. You can get this from different sources depending on your graphics card (or lack thereof). Install libgl1-mesa-glx or libgl1-fglrx-glx (ati) or libgl1-nvidia-glx (nvidia). Then continue.

Again, note that you may want to change the versions of the packages below that you install. Anyway, here's a list that may work:

sudo apt-get install libpng3 libglu1-mesa libgtk2.0-0 libatk1.0-0 libgdk-pixbuf2.0-0 libpango1.0-0 libglib2.0-0 libfreetype6 libxrender1 libfontconfig1 libx11-6 libxext6 libpng12-0 libxinerama1 libxxf86vm1 libsm6 lib32z1 zlib1g libc6 libpython2.6 libstdc++6 libgcc1 libxcomposite1 libxdamage1 libxfixes3 libcairo2 libxi6 libxrandr2 libxcursor1 libffi5 libexpat1 libpcre3 libxcb1 libice6 libuuid1 libssl1.0.0 libpixman-1-0 libxcb-shm0 libxcb-render0 libselinux1 libxau6 libxdmcp6

Get the compiled binary:

cd ~
wget http://www.olex2.org/olex2-distro/1.1/olex2-linux64.zip
unzip olex2-linux64.zip
cd ~/olex2
sed -i 's./work/distro/olex2-new.$HOME/olex2.g' start

Create the file ~/.local/share/applications/olex2.desktop

[Desktop Entry]
Name=Olex2
GenericName=Olex2
Comment=Software for refinement of crystal structures
Exec=sh /home/verahill/olex2/start
Terminal=false
Type=Application
Categories=Science
Version=1.1

You're now ready to use Olex2. If you launch it by hand, use the start script. Otherwise just launch is from your desktop.

Olex2 is very pretty, but  feels a bit incomplete and buggy though (again, I don't know if these are real issues or not -- and I'm no expert). The issue is that the program seems to throw errors every now and again. For example when clicking on electron density map in the Solve window:

Map sigma 0.000
: CalcFourier  {diff=}{r=0.1}{m=}
 N4esdl25TInvalidArgumentExceptionE mask size at [xlib/fracmask.cpp(Init):22]
 calcFourier -diff -r=0.1 -m

---

---

Problem with version 1.2:
Start Olex2. 1.2 takes a lot longer than 1.1 to start, but that's fine. Click on Tutorials. Click on Maps and Masks. CLick Next five times (the step where you actually create the mask). It triggers the following error:

An error occured running the function/macro next_demo_item

Traceback (most recent call last):
  File "olexFunctions.py", line 480, in func
    retVal = f(*args, **kwds)
  File "/home/verahill/olex2_1.2/etc/scripts/Tutorials.py", line 138, in next_demo_item
    self.run_demo_item()
  File "/home/verahill/olex2_1.2/etc/scripts/Tutorials.py", line 318, in run_demo_item
    flash_gui_control(control)
  File "gui/tools/__init__.py", line 123, in flash_gui_control
    OV.Refresh()
  File "guiFunctions.py", line 61, in Refresh
    olx.Refresh()
  File "/home/verahill/.olex2/data/4f11cd71424c9e8484c8c4f91644e3b6/olx/__init__.py", line 1319, in Refresh
    for arg in args:
RuntimeError: [repository/pyext.cpp(runOlexFunctionEx):354]: Function 'html.SetImage' failed: wrong html object name: 'IMG_H3-H3-MASKS'Key variable values:
 args = ()
 kwds = {}
 al = []

---

Problems with compiling:

sudo apt-get install libwxgtk2.8-dev
mkdir ~/tmp/svn_co
cd ~/tmp/svn_co
svn checkout svn://svn.code.sf.net/p/olex2/code/branches/1.2 olex2-1.2
cd olex2-1.2/
make 

/home/verahill/tmp/svn_co/olex2-1.2/gxlib/gxapp.cpp: In member function ‘esdl::TUndoData* gxlib::TGXApp::Name(gxlib::TXAtom&, const olxstr&, bool)’:
/home/verahill/tmp/svn_co/olex2-1.2/gxlib/gxapp.cpp:2003:73: error: no matching function for call to ‘gxlib::TGXApp::SynchroniseBonds(gxlib::TXAtomPList)’
/home/verahill/tmp/svn_co/olex2-1.2/gxlib/gxapp.cpp:2003:73: note: candidate is:
[..]
/home/verahill/tmp/svn_co/olex2-1.2/gxlib/gxapp.cpp: In member function ‘esdl::TUndoData* gxlib::TGXApp::Name(const olxstr&, const olxstr&, bool, bool)’:
/home/verahill/tmp/svn_co/olex2-1.2/gxlib/gxapp.cpp:2136:71: error: no matching function for call to ‘gxlib::TGXApp::SynchroniseBonds(gxlib::TXAtomPList)’
/home/verahill/tmp/svn_co/olex2-1.2/gxlib/gxapp.cpp:2136:71: note: candidate is:
[..[
make[1]: *** [/home/verahill/tmp/svn_co/olex2-1.2/obj/gxapp.s] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: *** [/home/verahill/tmp/svn_co/olex2-1.2/obj/gxmacro.s] Error 1
make[1]: Leaving directory `/home/verahill/tmp/svn_co/olex2-1.2'
make: *** [all] Error 2

There's a CMakeLists.txt file, but when doing e.g.

mkdir build_olex
cd build_olex/
cmake ../olex2-1.2

I get

CMake Error: Error in cmake code at
/home/verahill/tmp/svn_co/olex2-1.2/CMakeLists.txt:49:
Parse error.  Expected a command name, got unquoted argument with text "${olex2_html_SRCS}".
-- Configuring incomplete, errors occurred!