cardioidGenerator.py 文件源码

def _print_Pow(self, expr):
        PREC = sympy.printing.precedence.precedence(expr)
        if expr.exp == 0:
            return "1.0"
        elif expr.exp == 0.5:
            return 'sqrt(%s)' % self._print(expr.base)
        elif expr.exp == 1:
            return self.parenthesize(expr.base,PREC)
        elif expr.exp.is_constant and int(expr.exp) == expr.exp:
            base = self.parenthesize(expr.base,PREC)
            if expr.exp > 0:
                return "(" + "*".join(repeat(base,int(expr.exp))) + ")"
            else:
                return "(1.0/" + "/".join(repeat(base,int(expr.exp))) + ")"
        return 'pow(%s, %s)' % (self._print(expr.base),
                                self._print(expr.exp))