complexes.py 文件源码

def _eval_evalf(self, prec):
        from sympy import ceiling, oo
        z, period = self.args
        if period == oo:
            unbranched = periodic_argument._getunbranched(z)
            if unbranched is None:
                return self
            return unbranched._eval_evalf(prec)
        ub = periodic_argument(z, oo)._eval_evalf(prec)
        return (ub - ceiling(ub/period - S(1)/2)*period)._eval_evalf(prec)