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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 get_revision_history(brain_or_object):
 """Get the revision history for the given brain or context. :param brain_or_object: A single catalog brain or content object :type brain_or_object: ATContentType/DexterityContentType/CatalogBrain :returns: Workflow history :rtype: obj """

    obj = get_object(brain_or_object)
    chv = ContentHistoryView(obj, safe_getattr(obj, "REQUEST", None))
    return chv.fullHistory()