PyQt5 QLine-Edit验 证器的使用

from PyQt5.Qt import *
import sys
import math

#设置验证器
class AgeVadidator(QValidator):
    def validate(self, input_str, pos_int):
        print(input_str,pos_int)
        #判定
        #结果字符串，应该全部都是由一些数字组成
        #return
        try:
            if 18<=int(input_str)<=180:
                return (QValidator.Acceptable,input_str,pos_int)#验证通过
            elif 1<=int(input_str)<=17:
                return (QValidator.Intermediate,input_str,pos_int)#暂进被允许  
            else:
                return (QValidator.Invalid,input_str,pos_int)#验证不通过
        except:
            if len(input_str)==0:
                return (QValidator.Intermediate,input_str,pos_int)
            return (QValidator.Invalid,input_str,pos_int)
    def fixup(self,p_str):
        print("xxx",p_str)
        try:
            if int(p_str)<18:
                return "18"
            return "180"
        except:
            return "18"
class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("QLineEdit验证器的学习")
        self.resize(500,500)
        self.setup_ui()
    def setup_ui(self):
        le=QLineEdit(self)
        le.move(100,100)
        #18-180
        vadidator=AgeVadidator()
        le.setValidator(vadidator)

        le1=QLineEdit(self)
        le1.move(200,200)

App=QApplication(sys.argv)
Win=Window()
Win.show()
sys.exit(App.exec_())