(self, n)
return self.top_n[n][1]
Returns the document number of the result at position n in the list
        of ranked documents.
Returns the document number of the result at position n in the list
        of ranked documents.
Returns the document number of the result at position n in the list of ranked documents .
def docnum(self, n):
        """Returns the document number of the result at position n in the list
        of ranked documents.
        """
        return self.top_n[n][1]
def docnum ( self , n ) : return self . top_n [ n ] [ 1 ]