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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 _termIsObsolete(oboTerm):
 """Determine wheter an obo 'Term' entry is marked as obsolete. :param oboTerm: a dictionary as return by :func:`maspy.ontology._attributeLinesToDict()` :return: bool """

    isObsolete = False
    if u'is_obsolete' in oboTerm:
        if oboTerm[u'is_obsolete'].lower() == u'true':
            isObsolete = True
    return isObsolete