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")



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