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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 process_tag(node):
 """ Recursively go through a tag's children, converting them, then convert the tag itself. """

    text = ''

    exceptions = ['table']

    for element in node.children:
        if isinstance(element, NavigableString):
            text += element
        elif not node.name in exceptions:
            text += process_tag(element)

    try:
        convert_fn = globals()["convert_%s" % node.name.lower()]
        text = convert_fn(node, text)

    except KeyError:
        pass

    return text