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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 n_or_empty(self, _key):
 """Given a string name of one of the properties of this class, returns the value of the property as a string when the value is greater than 1. When it is not greater than one, returns an empty string. As an example, if you want to show an icon for new files, but you only want a number to appear next to the icon when there are more than one new file, you can do: segment = repo_stats.n_or_empty("new") + icon_string """

        return unicode_(self[_key]) if int(self[_key]) > 1 else u''