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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 loadSGMLSuperCatalog(filename):
 """Load an SGML super catalog. It won't expand CATALOG or DELEGATE references. This is only needed for manipulating SGML Super Catalogs like adding and removing CATALOG or DELEGATE entries. """

    ret = libxml2mod.xmlLoadSGMLSuperCatalog(filename)
    if ret is None:raise treeError('xmlLoadSGMLSuperCatalog() failed')
    return catalog(_obj=ret)