Capturing Return Values: Difference between revisions
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Some tasks return information in the form of Python dictionaries to the interface. For example, the | {{Using CASA Hints Tips Tricks}} | ||
If you just run | [[Category: CASA Basics]] | ||
Some tasks return information in the form of Python dictionaries to the interface. For example, the {{imstat}} task returns a dictionary with image statistics in it. If you just run | |||
<source lang="python"> | <source lang="python"> | ||
imstat('ngc5921.clean.image') | imstat('ngc5921.clean.image') | ||
| Line 10: | Line 12: | ||
xstat=imstat('ngc5921.clean.image') | xstat=imstat('ngc5921.clean.image') | ||
</source> | </source> | ||
You'll still get handy output in the logger, but now this information is also saved in <tt>xstat</tt>. To see what is in the dictionary, type the variable name at the command line | You'll still get handy output in the logger, but now this information is also saved in <tt>xstat</tt>. To see what is in the dictionary, type the variable name at the command line: | ||
<source lang="python"> | <source lang="python"> | ||
CASA <49>: xstat | CASA <49>: xstat | ||
| Line 35: | Line 37: | ||
'trcf': '10:45:01.025, +12.16.00.831, I, 1.417193e+09Hz'} | 'trcf': '10:45:01.025, +12.16.00.831, I, 1.417193e+09Hz'} | ||
</source> | </source> | ||
[[Main Page | ↵ '''CASAguides''']] <br> | |||
Latest revision as of 21:52, 7 June 2010
Some tasks return information in the form of Python dictionaries to the interface. For example, the imstat task returns a dictionary with image statistics in it. If you just run
imstat('ngc5921.clean.image')
image statistics will be listed in your logger.
However, you might want to catch these return statistics for later reference---in this case, simply assign a variable to the task call. For example:
xstat=imstat('ngc5921.clean.image')
You'll still get handy output in the logger, but now this information is also saved in xstat. To see what is in the dictionary, type the variable name at the command line:
CASA <49>: xstat
Out[49]:
{'blc': array([0, 0, 0, 0], dtype=int32),
'blcf': '10:48:29.468, +11.25.00.788, I, 1.415435e+09Hz',
'flux': array([-4.81267573]),
'max': array([ 0.10524261]),
'maxpos': array([131, 135, 0, 191], dtype=int32),
'maxposf': '10:46:42.548, +11.52.01.999, I, 1.416927e+09Hz',
'mean': array([ -1.06455120e-05]),
'medabsdevmed': array([ 0.00505883]),
'median': array([ -7.22291297e-05]),
'min': array([-0.0433579]),
'minpos': array([132, 101, 0, 217], dtype=int32),
'minposf': '10:46:41.731, +11.45.13.999, I, 1.41713e+09Hz',
'npts': array([ 14811136.]),
'quartile': array([ 0.01011763]),
'rms': array([ 0.00774033]),
'sigma': array([ 0.00774032]),
'sum': array([-157.67212591]),
'sumsq': array([ 887.37451309]),
'trc': array([255, 255, 0, 225], dtype=int32),
'trcf': '10:45:01.025, +12.16.00.831, I, 1.417193e+09Hz'}
