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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 strip_code(self, normalize=True, collapse=True, keep_template_params=False):
 """Return a rendered string without unprintable code such as templates. The way a node is stripped is handled by the :meth:`~.Node.__strip__` method of :class:`.Node` objects, which generally return a subset of their nodes or ``None``. For example, templates and tags are removed completely, links are stripped to just their display part, headings are stripped to just their title. If *normalize* is ``True``, various things may be done to strip code further, such as converting HTML entities like ``&Sigma;``, ``&#931;``, and ``&#x3a3;`` to ``Σ``. If *collapse* is ``True``, we will try to remove excess whitespace as well (three or more newlines are converted to two, for example). If *keep_template_params* is ``True``, then template parameters will be preserved in the output (normally, they are removed completely). """

        kwargs = {
            "normalize": normalize,
            "collapse": collapse,
            "keep_template_params": keep_template_params
        }

        nodes = []
        for node in self.nodes:
            stripped = node.__strip__(**kwargs)
            if stripped:
                nodes.append(str(stripped))

        if collapse:
            stripped = "".join(nodes).strip("\n")
            while "\n\n\n" in stripped:
                stripped = stripped.replace("\n\n\n", "\n\n")
            return stripped
        else:
            return "".join(nodes)