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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 _parse_normalization(normalization):
 """Parse a normalization item. Transform dicts into a tuple containing the normalization options. If a string is found, the actual value is used. Args: normalization: Normalization to parse. Returns: Tuple or string containing the parsed normalization. """

        parsed_normalization = None

        if isinstance(normalization, dict):
            if len(normalization.keys()) == 1:
                items = list(normalization.items())[0]
                if len(items) == 2: # Two elements tuple
                    # Convert to string if no normalization options
                    if items[1] and isinstance(items[1], dict):
                        parsed_normalization = items
                    else:
                        parsed_normalization = items[0]
        elif isinstance(normalization, STR_TYPE):
            parsed_normalization = normalization

        return parsed_normalization