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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 peak_templates(self):
 """Create a list of concrete peak templates from a list of general peak descriptions. :return: List of peak templates. :rtype: :py:class:`list` """

        peak_templates = []
        for peak_descr in self:
            expanded_dims = [dim_group.dimensions for dim_group in peak_descr]
            templates = product(*expanded_dims)
            for template in templates:
                peak_templates.append(PeakTemplate(template))
        return peak_templates