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12mysql.py
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12mysql.py
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"""
Author: TangYue
"""
'''
学生成绩单程序
成绩录入(多学科)
成绩修改
成绩查询
按学号/姓名查询
班级最高分
班级平均分
学科最高分
学科平均分
学科及格率
要求
使用面向对象式编程
使用MySQL数据库
'''
import pymysql
class Score:
pass
def __init__(self):
self.db = pymysql.connect(
host='xxxx',
port=3306,
user='root',
passwd='xxxx',
db='croak',
charset='utf8',
autocommit=True)
self.cur = self.db.cursor()
self.cursor = self.db.cursor()
self.cursor.execute("DROP TABLE IF EXISTS Stuscore")
self.cur.execute("use croak;")
# 建表
self.cur.execute("create table Stuscore("
"name char(20),"
"num int(20),"
"chinese char(20),"
"english char(20),"
"math char(20),"
"total char(20)) character set utf8;")
def appendStudentInfo(self):
self.db = pymysql.connect(host='xxxx', port=3306, user='root',
passwd='xxxx', db='croak',
charset='utf8', autocommit=True)
self.cursor = self.db.cursor() # 利用db方法创建游标对象
name = input("请输入学生姓名:")
num = input("请输入学生学号:")
chinese = input("请输入语文成绩:")
math = input("请输入数学成绩:")
english = input("请输入英语成绩:")
total = int(chinese) + int(math) + int(english)
sql = """INSERT INTO Stuscore(NAME,NUM,CHINESE,ENGLISH,MATH,
TOTAL)VALUES (%s,%s,%s,%s,%s,%s)"""
try:
self.cursor.execute(sql, (name, num, chinese, english, math, total))
self.cur.execute("use croak;")
self.db.commit()
except:
self.db.rollback()
self.db.close()
def delstudentname(self, delstudentname):
self.db = pymysql.connect(host='xxxx', port=3306, user='root',
passwd='xxxx', db='croak',
charset='utf8', autocommit=True)
self.cursor = self.db.cursor() # 利用db方法创建游标对象
sql = "DELETE FROM Stuscore WHERE Name='" + delstudentname + "'"
try:
self.cursor.execute(sql)
self.cur.execute("use croak;")
self.db.commit()
except:
self.db.rollback()
self.db.close()
print("删除成功")
def delstudentnum(self, delstudentnum):
self.db = pymysql.connect(host='xxxx', port=3306, user='root',
passwd='xxxx', db='croak',
charset='utf8', autocommit=True)
self.cursor = self.db.cursor() # 利用db方法创建游标对象
sql = "DELETE FROM Stuscore WHERE NUM='" + delstudentnum + "'"
querysql = 'select * from Stuscore where NUM="%s"' % delstudentnum
try:
self.cursor.execute(sql)
self.cur.execute("use croak;")
self.db.commit()
except:
self.db.rollback()
result = self.cursor.execute(querysql)
print(result)
self.cur.execute("use croak;")
if result:
print("删除失败")
print("删除成功")
def querystudentname(self, studentname):
self.db = pymysql.connect(host='xxxx', port=3306, user='root',
passwd='xxxx', db='croak',
charset='utf8', autocommit=True)
self.cursor = self.db.cursor() # 利用db方法创建游标对象
sql = 'select * from Stuscore where NAME="%s"' % studentname
try:
self.cursor.execute(sql)
self.cur.execute("use croak;")
results = self.cursor.fetchall()
print("NAME=%s,NUM=%s,CHINESE=%s,ENGLISH=%s,MATH=%s,TOTAL=%s" % \
(results[0][0], results[0][1], results[0][2], results[0][3],
results[0][4], results[0][4]))
return True
except:
self.db.rollback()
def querystudentnum(self, studentnum):
self.db = pymysql.connect(host='xxxx', port=3306, user='root',
passwd='xxxx', db='croak',
charset='utf8', autocommit=True)
self.cursor = self.db.cursor() # 利用db方法创建游标对象
sql = 'select * from Stuscore where NUM="%s"' % studentnum
try:
self.cursor.execute(sql)
self.cur.execute("use croak;")
results = self.cursor.fetchall()
print("NAME=%s,NUM=%s,CHINESE=%s,ENGLISH=%s,MATH=%s,TOTAL=%s" % \
(results[0][0], results[0][1], results[0][2], results[0][3],
results[0][4], results[0][4]))
return True
except:
self.db.rollback()
def modifystudentifo(self, Nname, Nchinese, Nenglish, Nmath):
total = int(Nchinese) + int(Nmath) + int(Nenglish)
Ntotal = str(total)
self.db = pymysql.connect(host='xxxx', port=3306, user='root',
passwd='xxxx', db='croak',
charset='utf8', autocommit=True)
self.cursor = self.db.cursor() # 利用db方法创建游标对象
sql = "UPDATE Stuscore SET MATH='%s',CHINESE='%s',ENGLISH='%s',TOTAL='%s' WHERE NAME = '%s'" % (
Nmath, Nchinese, Nenglish, Ntotal, Nname)
try:
self.cursor.execute(sql)
self.cur.execute("use croak;")
self.db.commit()
except:
self.db.rollback()
self.db.close()
def modifystudentifonum(self, Nnum, Nchinese, Nenglish, Nmath):
total = int(Nchinese) + int(Nmath) + int(Nenglish)
Ntotal = str(total)
self.db = pymysql.connect(host='xxxx', port=3306, user='root',
passwd='xxxx', db='croak',
charset='utf8', autocommit=True)
self.cursor = self.db.cursor() # 利用db方法创建游标对象
sql = "UPDATE Stuscore SET MATH='%s',CHINESE='%s',ENGLISH='%s',TOTAL='%s' WHERE NAME = '%s'" % (
Nmath, Nchinese, Nenglish, Ntotal, Nnum)
try:
self.cursor.execute(sql)
self.cur.execute("use croak;")
self.db.commit()
except:
self.db.rollback()
self.db.close()
def allinfo(self):
self.db = pymysql.connect(host='xxxx', port=3306, user='root',
passwd='xxxx', db='croak',
charset='utf8', autocommit=True)
self.cursor = self.db.cursor() # 利用db方法创建游标对象
sql = "select * from Stuscore"
self.cursor.execute(sql)
self.cur.execute("use croak;")
results = self.cursor.fetchall()
# print(results)
dict_num = {}
i = 0
print("偏科的有:")
for row in results:
NAME = row[0]
NUM = row[1]
CHINESE = int(row[2])
ENGLISH = int(row[3])
MATH = int(row[4])
AVE = int(row[5]) / 3
dict_num[i] = int(row[5])
i = i + 1
if abs(int(CHINESE - ENGLISH)) > 20 or abs(
int(CHINESE - MATH)) > 20 or abs(int(ENGLISH - MATH)) > 20:
print("NAME=%s,CHINESE=%s,ENGLISH=%s,MATH=%s,AVE=%s" % (
NAME, CHINESE, ENGLISH, MATH, AVE))
d1 = sorted(dict_num.items(), key=lambda dict_num: dict_num[1],
reverse=False)
print("排序:")
for row in d1:
name = results[int(row[0])][0]
num = int(results[int(row[0])][1])
chinese = int(results[int(row[0])][2])
english = int(results[int(row[0])][3])
math = int(results[int(row[0])][4])
total = int(results[int(row[0])][5])
print("NAME=%s,NUM=%s,CHINESE=%s,ENGLISH=%s,MATH=%s,TOTAL=%s" % (
name, num, chinese, english, math, total))
def studentMenu(self):
print("=" * 30)
print("学生管理系统")
print("1、添加学生信息")
print("2、删除学生信息")
print("3、查询学生信息")
print("4、修改学生信息")
print("5、全部学生信息")
print("6、退出")
print("=" * 30)
if __name__ == '__main__':
test = Score()
while True:
test.studentMenu()
menuindex = input("请输入选项序号:")
while not menuindex.isdigit():
menuindex = input("输入错误,请重新输入:")
if int(menuindex) == 1:
test.appendStudentInfo()
elif int(menuindex) == 2:
print("1、输入学生姓名")
print("2、输入学生学号")
menuindexson = input("请输入选项序号:")
if int(menuindexson) == 1:
delstudentname = input("请输入要删除的学生姓名:")
test.delstudentname(delstudentname)
elif int(menuindexson) == 2:
delstudentnum = input("请输入要删除的学生学号:")
test.delstudentnum(delstudentnum)
elif int(menuindex) == 3:
print("1、输入学生姓名")
print("2、输入学生学号")
menuindexson = input("请输入选项序号:")
if int(menuindexson) == 1:
studentname = input("请输入要查询的学生名字:")
test.querystudentname(studentname)
elif int(menuindexson) == 2:
studentnum = input("请输入要查询的学生学号:")
test.querystudentnum(studentnum)
elif int(menuindex) == 4:
print("1、输入学生姓名")
print("2、输入学生学号")
menuindexson = input("请输入选项序号:")
if int(menuindexson) == 1:
Nname = input("要修改成绩的学生姓名:")
Nchinese = input("请重新输入语文成绩:")
Nmath = input("请重新输入数学成绩:")
Nenglish = input("请重新输入英语成绩:")
test.modifystudentifo(Nname, Nchinese, Nenglish, Nmath)
elif int(menuindexson) == 2:
Nnum = input("要修改成绩的学生学号:")
Nchinese = input("请重新输入语文成绩:")
Nmath = input("请重新输入数学成绩:")
Nenglish = input("请重新输入英语成绩:")
test.modifystudentifonum(Nnum, Nchinese, Nenglish, Nmath)
elif int(menuindex) == 5:
test.allinfo()
elif int(menuindex) == 6:
break
else:
print("输入序号无效")