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马上注册,结交更多好友,享用更多功能^_^
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代码如下:import sqlite3
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QWidget
from PyQt5.QtWidgets import *
from Mainview.Login import Ui_Login
from Mainview.Register import Ui_Register
from Student.StudentClass import Sc
import pymysql
from Mainview.sqltool import sqlInsert, register, sqlDelete, sqlChange, findSql, sqlnum
class Run(Ui_Login,QWidget):
def __init__(self):
super(Run,self).__init__()
self.setupUi(self)
#信号槽
self.Loading.clicked.connect(self.close)
self.register_2.clicked.connect(self.close)
self.exit.clicked.connect(self.close)
self.viewpwd.clicked.connect(self.passit)
def passit(self):
if self.password.echoMode() == QLineEdit.Password:
self.password.setEchoMode(QLineEdit.Normal)
else:
self.password.setEchoMode(QLineEdit.Password)
class Run_sc(Sc, QMainWindow):
def __init__(self):
super(Run_sc, self).__init__()
self.setupUi(self)
self.pushButton.clicked.connect(self.close)
class Run_re(Ui_Register, QMainWindow):
def __init__(self):
super(Run_re, self).__init__()
self.setupUi(self)
self.cancel.clicked.connect(self.close)
self.Register_2.clicked.connect(self.Register)
def Register(self):
username_1 = self.username.text()
passwd_1 = self.passwd.text()
recpd = self.recpd.text()
if not passwd_1 or not recpd: # 如果有一个密码或者密码确认框为空
QMessageBox.information(self, 'Error', 'The password is empty', QMessageBox.Yes)
elif self.is_has(username_1): # 如果用户名已经存在
QMessageBox.information(self, 'Error', 'The username already exists', QMessageBox.Yes)
else:
if passwd_1 == recpd and passwd_1: # 如果两次密码一致,并且不为空
connect = pymysql.connect(
host='localhost',
user='root',
passwd='123456',
database='scCollege',
charset='utf8'
)
cursor = connect.cursor()
sql = "insert into userinfo(username_1, passwd) values (%s, %s);"
cursor.execute(sql, [username_1, passwd_1])
connect.commit()
cursor.close()
connect.close()
QMessageBox.information(self, '成功!', '注册成功!'.format(username_1),QMessageBox.Yes)
self.close() # 注册完毕之后关闭窗口
else:
QMessageBox.information(self, '错误!', 'The password is not equal', QMessageBox.Yes)
def is_has(username):
"""判断数据库中是否含有用户名"""
connect = pymysql.connect(
host='localhost',
user='root',
passwd='123456',
database='scCollege',
charset='utf8'
)
cursor = connect.cursor()
sql = "select * from userinfo where username_1 = %s"
result = cursor.execute(sql, [username])
connect.commit()
data = cursor.fetchall() # 获取所有的内容
cursor.close()
connect.close()
if data:
return True
else:
return False
def closeEvent(self, event):
# 关闭之后将输入框清空
self.username.setText('')
self.recpd.setText('')
self.passwd.setText('')
if __name__=="__main__":
#1、创建一个应用
import sys
app=QtWidgets.QApplication(sys.argv)
ui=Run()
ui2=Run_sc()
ui3 = Run_re()
ui.show()
# ui.login()
# ui.Register()
ui.Loading.clicked.connect(ui2.show)
ui.register_2.clicked.connect(ui3.show)
ui3.cancel.clicked.connect(ui.show)
#5、启动主循环
sys.exit(app.exec_())
但是会出现如下错误
求大神帮忙,谢谢
连接数据库有不同的写法,根据你这里的我稍微改一下,应该可以看得懂了。
ps: 可以参考官网的写法,用with语句更方便、简洁。 import pymysql
def is_has(user_input):
"""判断数据库中是否含有用户名"""
connect = pymysql.connect(
host='localhost',
user='root',
passwd='123456',
database='mydb',
charset='utf8'
)
cursor = connect.cursor()
sql = "select * from score where name = %s"
cursor.execute(sql, [user_input])
# connect.commit() # 非DML语句无序commit()。insert, update, delete这样的DML语句才行考虑commit()
data = cursor.fetchall() # 获取所有的内容
cursor.close()
connect.close()
if data:
return True
else:
return False
if __name__ == "__main__":
stu_name = input("输入要查找的学生名:")
print(is_has(user_input=stu_name))
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