I'm running python2.5 and trying to use the astLib library to analyse WCS information in astronomical images. I try and get the object instanciated with the following skeleton code:
from astLib import astWCS
w = astWCS.WCS('file.fits') # error here
where file.fits is a string pointing to a valid fits file.
I have tried using the alternate method of passing a pyfits header object and this fails also:
import pyfits
from astLib import astWCS
f = pyfits.open('file.fits')
header = f[0].header
f.close()
w = astWCS.WCS(header, mode='pyfits') # error here also
The error is this:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/home/astro/phrfbf/build/lib/python2.6/site-packages/astLib/astWCS.py", line 79, in __init__
self.updateFromHeader()
File "/home/astro/phrfbf/build/lib/python2.6/site-packages/astLib/astWCS.py", line 119, in updateFromHeader
self.WCSStructure=wcs.wcsinit(cardstring)
File "/home/astro/phrfbf/build/lib/python2.6/site-packages/PyWCSTools/wcs.py", line 70, in wcsinit
return _wcs.wcsinit(*args)
TypeError: in method 'wcsinit', argument 1 of type 'char *'
When I run in ipython, I get the full error here on the pastebin
I know the astWCS module is a wrapped version of WCStools but i'd prefer to use the Python module as the rest of my code is in Python
Can anyone help with this problem?
Just found out the updated version of this library has fixed the problem, thanks for everyone's help