import pymysql
class Student:
def register(self):
print("=============注册页面=============")
n = 3
user = input("请输入账号：").strip()
while n > 0:
n = n - 1
pass_wd = input("请输入密码:").strip()
pass_wd_sec = input("确认你的密码:").strip()
sql_1 = "insert into student_info(user_name,passwd) values(%s,%s)"
if pass_wd != pass_wd_sec:
print("两次输入不一致，请重新输入！\n")
print("你还有" + str(n) + "次机会!")
continue
else:
res_1 = [user, pass_wd_sec]
cur.execute(sql_1, res_1)
conn.commit()
print("注册成功！\n")
break
def login(self):
n = 3
sql = "select passwd from student_info where user_name =%s"
res = [user]
cur.execute(sql, res)
psw = cur.fetchall()
while n > 0:
n = n - 1
pass_wd = input("请输入你的密码:").strip()
if pass_wd != psw[0][0]:
print("密码错误，请重新输入！\n")
print("你还有" + str(n) + "次机会！")
continue
else:
print("登录成功!\n")
break
def achievement(self):
# 这里实现成绩录入与成绩查询
print("=================成绩录入与查询=====================")
status = input("选择你的操作 【0:录入，1:查看，其他:退出】")
while True:
if status == '0':
student_no = input("学号：")
subject_name = input("课程名称：")
score = int(input("课程分数"))
rest_insert = [student_no, subject_name, score]
cur.execute(sql_insert, rest_insert)
conn.commit()
break
elif status == '1':
student_no = input("学号：")
rest_choice = [student_no]
cur.execute(sql_choice, rest_choice)
rest_cho = cur.fetchall()
for sc in rest_cho:
print(sc)
conn.commit()
break
# cd = input("\n选择你的操作 【0:继续，1:退出】")
# if cd == '1':
# break
# else:
# continue
else:
break
def course_selection(self):
print("\n===================选课模块===============")
while True:
alternative = input("请操作【1|查看我的课程 2|查看当前所有可选课程 3|选课 other|退出】：")
student_no = input("输入学号：")
if alternative == "1":
my_res = [student_no]
cur.execute(my_sql, my_res)
my_subject = cur.fetchall()
conn.commit()
print("你当前的课程有：" + str(my_subject) + "\n")
elif alternative == "2":
cur.execute(all_sql)
all_subject = cur.fetchall()
conn.commit()
for i in all_subject:
print("当前可选的课程有：" + str(i))
elif alternative == "3":
subject_name = input("请输入你要选择的课程名称:")
subject_id = input("请输入你要选择的课程id:")
all_to_my_res = [student_no, subject_id, subject_name]
cur.execute(all_to_my, all_to_my_res)
all_to_my_subject = cur.fetchall()
conn.commit()
print("选课结果为" + str(all_to_my_subject))
else:
print("操作有误，请重新输入！")
break
if __name__ == '__main__':
user = input("请输入账号：").strip()
conn = pymysql.connect(
host="localhost",
port=3306,
user="root",
passwd="mysql",
db="student",
charset="utf8")
cur = conn.cursor()
sql = "select user_name from student_info where user_name =%s"
my_sql = "select subject_id, subject_name from my_subject where student_no = %s;"
sql_insert = "insert into student_score(student_no,subject_name,score) values(%s,%s,%s)"
sql_choice = "select * from student_score where student_no = %s"
all_sql = "select * from subject_choice;"
all_to_my = "insert into my_subject(student_no, subject_id, subject_name) VALUES (%s,%s,%s)"
res = [user]
cur.execute(sql, res)
name = cur.fetchall()
s = Student()
if name == ():
print("账号不存在，请返回注册\n")
s.register()
print("=============登录界面=============")
user = input("请输入账号：").strip()
s.login()
s.achievement()
else:
s.login()
s.achievement()
s.course_selection()
cur.close()
conn.close()
