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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 _dict_to_html_attributes(d):
 """ Converts a dictionary to a string of ``key=\"value\"`` pairs. If ``None`` is provided as the dictionary an empty string is returned, i.e. no html attributes are generated. Parameters d : dict Dictionary to convert to html attributes. Returns ------- str where ``N`` is the total number of ``(key, value)`` pairs. """

        if d is None:
            return ""

        return "".join(" {}=\"{}\"".format(key, value) for key, value in iter(d.items()))