基于mysql的python_Python基于mysql实现学生管理系统

本篇文章主要介绍了Python基于mysql实现学生管理系统，分享给大家，具体如下：

import pymysql

import re

def idinput(string):

ID = input(string)

pattern = re.compile("^d{1,3}$")

while not re.match(pattern, ID):

ID = input("请输入1-3位整数:")

return ID

def appendStudentInfo():

ID =idinput("请输入学生学号：")

db=pymysql.connect(host="127.0.0.1",user="root",passwd="hisense",db="test",port=3306,charset="utf8")

cursor=db.cursor()

sql = "select * from StuSys where ID = '%s'" % ID

cursor.execute(sql)

while cursor.rowcount > 0 :

ID = idinput("该学号已存在，请重新输入:")

sql = "select * from StuSys where ID = '%d'" % int(ID)

cursor.execute(sql)

name=input("请输入学生姓名：")

chinese=input("请输入语文成绩：")

while not chinese.isdigit() or int(chinese)>100 or int(chinese)<0:

chinese = input("输入错误，请重新输入：")

math =input("请输入数学成绩：")

while not math.isdigit() or int(math) > 100 or int(math) < 0:

math = input("输入错误，请重新输入：")

english=input("请输入英语成绩：")

while not english.isdigit() or int(english) > 100 or int(english) < 0:

english = input("输入错误，请重新输入：")

total=int(chinese)+int(math)+int(english)

sql="""INSERT INTO StuSys(ID,

NAME,CHINESE,ENGLISH,MATH,TOTAL)

VALUES (%s,%s,%s,%s,%s,%s)"""

cursor.execute(sql,(ID,name,chinese,english,math,total))

db.commit()

db.close()

def delstudent():

delstudentid = idinput("请输入要删除的学生学号：")

if querystudent(delstudentid):

select = input("是否删除：是(Y)/否(N)")

if select == "Y" or select == "y":

db = pymysql.connect(host="127.0.0.1", user="root", passwd="hisense", db="test", port=3306, charset="utf8")

cursor = db.cursor()

sql = "delete from stusys where ID =%s" %delstudentid

cursor.execute(sql)

db.commit()

db.close()

print("删除成功")

elif select == "N" or select == "n":

print("取消删除")

else:

print("输入错误")

def querystudent(querystudentid):

db=pymysql.connect(host="127.0.0.1",user="root",passwd="hisense",db="test",port=3306,charset="utf8")

cursor=db.cursor()

sql="select * from stusys where ID=%s"%querystudentid

cursor.execute(sql)

if cursor.rowcount ==0 :

print("不存在该学生信息")

return False

else:

print("该学生信息如下：")

results =cursor.fetchall()

print("ID=%d,NAME=%s,CHINESE=%d,ENGLISH=%d,MATH=%d,TOTAL=%d" %

(results[0][0], results[0][1], results[0][2], results[0][3], results[0][4],results[0][5]))

return True

def modifystudentifo():

modifyid = idinput("请输入要的学生学号：")

if querystudent(modifyid):

name = input("请重新输入学生姓名：")

chinese = input("请重新输入语文成绩：")

while not chinese.isdigit() or int(chinese) > 100 or int(chinese) < 0:

chinese = input("输入错误，请重新输入：")

math = input("请重新输入数学成绩：")

while not math.isdigit() or int(math) > 100 or int(math) < 0:

math = input("输入错误，请重新输入：")

english = input("请重新输入英语成绩：")

while not english.isdigit() or int(english) > 100 or int(english) < 0:

english = input("输入错误，请重新输入：")

total = int(chinese) + int(math) + int(english)

db = pymysql.connect(host="127.0.0.1", user="root", passwd="hisense", db="test", port=3306, charset="utf8")

cursor = db.cursor()

sql1="update stusys set name ='%s' where id = %s"%(name,modifyid)

cursor.execute(sql1)

sql2="update stusys set math = %s where id = %s"%(math,modifyid)

cursor.execute(sql2)

sql3 = "update stusys set english = %s where id =%s"%(english,modifyid)

cursor.execute(sql3)

sql4 = "update stusys set total = %s where id = %s"%(total,modifyid)

cursor.execute(sql4)

sql5 = "update stusys set chinese = %s where id = %s"%(chinese,modifyid)

cursor.execute(sql5)

db.commit()

db.close()

def allinfo():

db=pymysql.connect(host="127.0.0.1",user="root",passwd="hisense",db="test",port=3306,charset="utf8")

cursor=db.cursor()

sql="select * from stusys"

cursor.execute(sql)

results= cursor.fetchall()

for row in results:

ID = row[0]

NAME = row[1]

CHINESE = row[2]

ENGLISH = row[3]

MATH = row[4]

TOTAL = row[5]

# 打印结果

print("ID=%d,NAME=%s,CHINESE=%d,ENGLISH=%d,MATH=%d,TOTAL=%d" %

(ID, NAME, CHINESE, ENGLISH, MATH,TOTAL))

def studentMenu():

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__':

while True:

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:

appendStudentInfo()

elif int(menuindex) ==2:

delstudent()

elif int(menuindex) ==3:

querystudentid = idinput("请输入要查询的学生学号：")

querystudent(querystudentid)

elif int(menuindex) ==4:

modifystudentifo()

elif int(menuindex) == 5:

allinfo()

elif int(menuindex) == 6:

break

else:

print("输入序号无效")

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持聚米学院。