embedTag = pyparsing.makeHTMLTags('embed')[0]
aTag = pyparsing.makeHTMLTags('a')[0]
target = embedTag + pyparsing.Optional(aTag)
result = target.searchString(
    """.....   
    <object....><embed>.....</embed></object><br /><a href="blah">blah</a>
    """
    )
Find following tag with pyparsing