Extracting scripts from these tutorials
The series of commands shown in each tutorial can be thought of as a data reduction script that can be run in CASA like so:
where 'scriptname.py' is the name of an ascii file containing all of the CASA commands you want to run.
Hopefully the scripts contained in this documentation are (a) useful and (b) work. They were however developed with CASA still a work in progress, and so scripts may break as commands, arguments, and keywords change. We developed this script extractor to allow us to easily extract scripts from these pages and run them. Feel free to try it--it's handy for general users too!
The only differences you will see between the commands in each tutorial and the extracted script are requests for response from you after each interactive command (plotants, plotcal, plotms, etc.). These are to ensure that the tables you access to make plots are closed properly before they are needed by some following task (otherwise, you may experience the dreaded "table lock" errors, that may cause problems with your script, or in some cases even your CASA session.)
Note: the intention is to extract CASA scripts for testing; commands which are to be run on the command line outside of CASA, or within other software packages, will not be extracted.
How to Get the Script Extractor
For most uses, the single-module script extractor is all you will need. You can download it from https://raw.github.com/jaredcrossley/CASA-Guides-Script-Extractor/master/extractCASAscript.py.
This Python module is maintained in a github repository as part of a simple, automated benchmark testing system. You can browse the whole repository at https://github.com/jaredcrossley/CASA-Guides-Script-Extractor.
The older, pre-github version of the script extractor can be obtianed from ftp://ftp.cv.nrao.edu:/NRAO-staff/jgallimo/extractCASAscript.py.
How to Use the Script Extractor
Make your newly acquired python script executable.
# in bash chmod u+x extractCASAscript.py
To run it, issue the python script name and give the URL as the argument. For example:
# in bash ./extractCASAscript.py http://casaguides.nrao.edu/index.php?title=Calibrating_a_VLA_5_GHz_continuum_survey
In csh, you need quotes around the URL:
# in csh ./extractCASAscript.py 'http://casaguides.nrao.edu/index.php?title=Calibrating_a_VLA_5_GHz_continuum_survey'
This command will automatically generate a script called CalibratingaVLA5GHzcontinuumsurvey.py.