(self)
Return the back pair of the structure
Return the back pair of the structure
Return the back pair of the structure
def back(self):
        '''Return the back pair of the structure'''
        v = tuple(self.irange(-1, -1))
        if v:
            return v[0]
def back ( self ) : v = tuple ( self . irange ( - 1 , - 1 ) ) if v : return v [ 0 ]