pretty.py 文件源码

def _print_ProductSet(self, p):
        if len(p.sets) > 1 and not has_variety(p.sets):
            from sympy import Pow
            return self._print(Pow(p.sets[0], len(p.sets), evaluate=False))
        else:
            prod_char = u('\xd7')
            return self._print_seq(p.sets, None, None, ' %s ' % prod_char,
                parenthesize=lambda set: set.is_Union or set.is_Intersection)