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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def verifyUpdatewcs(fname):
 """ Verify the existence of WCSNAME in the file. If it is not present, report this to the user and raise an exception. Returns True if WCSNAME was found in all SCI extensions. """

    updated = True
    numsci,extname = count_sci_extensions(fname)
    for n in range(1,numsci+1):
        hdr = fits.getheader(fname, extname=extname, extver=n, memmap=False)
        if 'wcsname' not in hdr:
            updated = False
            break
    return updated