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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 new_template(self, template_name='<None>'):
 """Append a new template from .rft entry to the journal. This instructs Revit to create a new template model based on the provided .rft template. Args: template_name (str):
 optional full path to .rft template to be used. default value is <None> """

        self._add_entry(templates.NEW_MODEL_TEMPLATE
                                 .format(template_name=template_name))