def filename_from_url(url):
    """
    Get the filename component of the URL

    >>> filename_from_url('http://example.com/somefile.zip')
    'somefile.zip'
    >>> filename_from_url('http://oceandata.sci.gsfc.nasa.gov/Ancillary/LUTs/modis/utcpole.dat')
    'utcpole.dat'
    """
    return url.split('/')[-1]