cwitools.utils.extract_hdu¶

cwitools.utils.extract_hdu(fits_in, nhdu=0)¶

Load a HDU whether the input type is HDUList, PrimaryHDU or ImageHDU.

Parameters:	fits_in – An astropy.fits.HDUlist, .ImageHDU or .PrimaryHDU or a string which is the path of a FITS file. nhdu (int) – Which HDU to extract, if HDUList type or file given. Default is 0 (first HDU).
Returns:	The input HDU or the Primary HDU of an input HDUList or FITS file.
Return type:	HDU

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