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Python學(xué)生信息管理系統(tǒng)修改版

更新時(shí)間：2018年03月13日 15:39:38 作者：MTbaby

這篇文章主要為大家詳細(xì)介紹了python學(xué)生信息管理系統(tǒng)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

在學(xué)習(xí)之前先要了解sqlite游標(biāo)的使用方法python使用sqlite3時(shí)游標(biāo)的使用方法

繼上篇博客Python實(shí)現(xiàn)學(xué)生信息管理系統(tǒng)后，我就覺(jué)得寫的太復(fù)雜了，然后又是一通優(yōu)化、優(yōu)化、優(yōu)化；

本次優(yōu)化主要修改了：

1.使用游標(biāo)的方法連接、增、刪、改、查數(shù)據(jù)庫(kù)；
2.一般二級(jí)菜單是不能直接退出程序的，所以去掉了二級(jí)菜單退出程序的功能；
3.增加了連表查詢；
4.但是還有一點(diǎn)很不滿意，就是每次退出后都退出到主菜單而不是當(dāng)前菜單，這點(diǎn)還沒(méi)改好，希望小伙伴能一起學(xué)習(xí)交流！

#-*- coding:utf-8 -*-
import sqlite3
#打開(kāi)本地?cái)?shù)據(jù)庫(kù)用于存儲(chǔ)用戶信息
cx = sqlite3.connect('student.db')

#在該數(shù)據(jù)庫(kù)下創(chuàng)建學(xué)生信息表
cx.execute ('''CREATE TABLE StudentTable(
 ID INTEGER PRIMARY KEY AUTOINCREMENT,
 StuId   INTEGER  NOT NULL,
 NAME   TEXT  NOT NULL,
 CLASS   INT  NOT NULL);''')
print "Table created successfully";

#在該數(shù)據(jù)庫(kù)下創(chuàng)建課程信息表
cx.execute ('''CREATE TABLE CourseTable(
 ID INTEGER PRIMARY KEY AUTOINCREMENT,
 CourseId  INT  NOT NULL,
 Name   TEXT  NOT NULL,
 Teacher   TEXT  NOT NULL,
 Classroom   TEXT  NOT NULL,
 StartTime    CHAR(11) NOT NULL,
 EndTime    CHAR(11) NOT NULL);''')
print "Table created successfully";


#在該數(shù)據(jù)庫(kù)下創(chuàng)建選課情況信息表
cx.execute ('''CREATE TABLE XuankeTable(
 ID INTEGER PRIMARY KEY AUTOINCREMENT,
 StuId   INT   NOT NULL,
 CourseId   INT   NOT NULL);''')
print "Table created successfully";

#以上三個(gè)表創(chuàng)建完后，再次運(yùn)行程序時(shí)，需要把三個(gè)建表代碼注釋掉，否則會(huì)提示:該表已存在。即建表只需建一次。


def insert_stu():#錄入學(xué)生信息
 cu = cx.cursor()
 stu_id = input("請(qǐng)輸入學(xué)生學(xué)號(hào):")
 cu.execute("SELECT StuId from StudentTable where StuId = '%s';"%stu_id)
 row = cu.fetchone()
 if row:
  print "sorry,該學(xué)號(hào)已存在,請(qǐng)重新輸入"
 else:
  stu_name = raw_input("請(qǐng)輸入學(xué)生姓名:")
  stu_class = input("請(qǐng)輸入學(xué)生班級(jí):")
  sql1 = "INSERT INTO StudentTable(StuId,NAME,CLASS)"
  sql1 += " VALUES(%d,'%s',%d);"%(stu_id,stu_name,stu_class)
  cu.execute(sql1)
  cx.commit()
  print "恭喜你,學(xué)生錄入成功!"
 cu.close()


def xuanke():#學(xué)生選課
 cu = cx.cursor()
 stu_id = input('請(qǐng)輸入要選課的學(xué)生學(xué)號(hào):')
 sql2 = "select StuId from StudentTable where StuId = %d;"%(stu_id)
 cu.execute(sql2)
 row = cu.fetchone()
 if row:
  sql3 = "select CourseId,Name,Teacher,Classroom, StartTime,EndTime from CourseTable"
  cu.execute(sql3)
  rows = cu.fetchall()
  for row in rows:
   print "CourseId = ", row[0]
   print "Name = ", row[1]
   print "Teacher = ", row[2]
   print "Classroom = ",row[3]
   print "StartTime = ",row[4]
   print "EndTime = ",row[5], "\n"
  cou_id = input("請(qǐng)輸入要選的課程號(hào):")
  sql0 = "select CourseId from CourseTable where CourseId =%d;"%(cou_id)
  cu.execute(sql0)
  row = cu.fetchone()
  if row:
   sql = "select StuId CourseId from XuankeTable "
   sql += "where CourseId = %d and StuId=%d;"%(cou_id,stu_id)
   cu.execute(sql)
   rows = cu.fetchone()
   if row:
    print "該課程已選,不能重復(fù)選課!"
    break
   else:
    sql3 = "insert into XuankeTable (StuId,CourseId) values (%d,%d)"%(stu_id,cou_id)
    cu.execute(sql3)
    cx.commit()
    print "恭喜你，選課成功!"
  else:
   print "sorry,該課程不存在!"
 else:
  print "sorry,沒(méi)有該學(xué)生號(hào)"
 cu.close()



def stu_id_search():#按照學(xué)生學(xué)號(hào)查詢學(xué)生信息
 cu = cx.cursor()
 search_stu_id = input("請(qǐng)輸入要查詢的學(xué)號(hào):")
 sql4 = "SELECT ID,StuId,NAME, CLASS from StudentTable "
 sql4 += "where StuId= %d;" % (search_stu_id)
 cu.execute(sql4)
 row = cu.fetchone()
 if row: 
  print
  print "您要查詢的學(xué)生信息為:"
  print "ID = ", row[0]
  print "StuId = ", row[1]
  print "NAME = ", row[2]
  print "CLASS = ",row[3], "\n"
 else:
  print "sorry,沒(méi)有該學(xué)生信息！"
 cu.close()


def stu_id_cou():#按照學(xué)生學(xué)號(hào)查詢?cè)搶W(xué)生所選課程
 cu = cx.cursor()
 stu_id = input("請(qǐng)輸入要查詢學(xué)生號(hào):")
 sql5 = "select StuId from StudentTable where StuId = %d;"%(stu_id)
 cu.execute(sql5)
 row = cu.fetchone()
 if row :
  sql6 = "select A.*,B.*,C.* from XuankeTable A, CourseTable B, StudentTable C \
  where A.StuId = %d and A.CourseId=B.CourseId and A.StuId=C.StuId"%(stu_id)#連表查詢
  cu.execute(sql6)
  rows = cu.fetchall()
  for row in rows:
   print "該學(xué)生所選課程為:"
   print "StuId=",row[1]
   print "CourseId=",row[2]
   print "Name = ", row[7]
   print "Teacher = ", row[8]
   print "Classroom = ",row[9]
   print "StartTime = " ,row[10]
   print "EndTime = ",row[11],"\n"
   print
 else:
  print "sorry,沒(méi)有該學(xué)生選課信息!"
 cu.close()


def cou_id_search(): #按照課程號(hào)查詢課程信息
 cu = cx.cursor()
 cou_id = input("請(qǐng)輸入要查詢的課程號(hào):")
 sql7 = "select CourseId ,Name,Teacher,Classroom,StartTime,EndTime from CourseTable "
 sql7 += "where CourseId = %d;"%(cou_id)
 cu.execute(sql7)
 row = cu.fetchone()
 if row:
  print "您要查詢的課程信息為:"
  print "CourseId = ",row[0]
  print "Name = ", row[1]
  print "Teacher = ", row[2]
  print "Classroom = ",row[3]
  print "StartTime = " ,row[4]
  print "EndTime = ",row[5],"\n"
 else:
  print "sorry,沒(méi)有該課程信息!"
 cu.close()


def cou_id_stu():#按照課程號(hào)查詢選擇該課程的學(xué)生列表
 cu = cx.cursor()
 cou_id = input('請(qǐng)輸入課程號(hào):')
 sql8 = "select CourseId from XuankeTable where CourseId =%d;"%(cou_id)
 cu.execute(sql8)
 row = cu.fetchone()
 if row:
  sql9 = "select A.*,B.*,C.* from XuankeTable A, CourseTable B, StudentTable C \
  where A.CourseId = %d and A.CourseId=B.CourseId and A.StuId=C.StuId"%(cou_id)
  cu.execute(sql9)
  rows = cu.fetchall()
  for row in rows:
   print
   print "選擇該課程的學(xué)生為:"
   print "StuId = ", row[1]
   print "CourseId = ", row[2]
   print "NAME = ", row[14]
   print "CLASS = ",row[15],"\n"
 else:
  print "sorry,沒(méi)有該課程信息!"
 cu.close()

def menu():
 print '1.進(jìn)入學(xué)生信息系統(tǒng)(學(xué)生信息錄入)'
 print '2.進(jìn)入學(xué)生選課系統(tǒng)(學(xué)生選課操作)'
 print '3.進(jìn)入學(xué)生選課信息系統(tǒng)(學(xué)生信息查詢和選課情況查詢)'
 print '4.退出程序'

def student():
 print '1.錄入學(xué)生信息'
 print '2.返回主菜單'

def Course():
 print '1.開(kāi)始選課'
 print '2.返回主菜單'

def information():
 print '1.按學(xué)號(hào)查詢學(xué)生信息'
 print '2.按學(xué)號(hào)查看學(xué)生選課課程列表'
 print '3.按課程號(hào)查看課程信息'
 print '4.按課程號(hào)查看選課學(xué)生列表'
 print '5.返回主菜單'


while True:
 menu()
 print
 x = raw_input('請(qǐng)輸入您的選擇菜單號(hào):')
 if x == '1':
  #進(jìn)入學(xué)生信息系統(tǒng)
  student()
  stu = raw_input('您已進(jìn)入學(xué)生錄入系統(tǒng),請(qǐng)?jiān)俅屋斎脒x擇菜單:')
  print
  if stu == '1':
   insert_stu()
   continue
  if stu == '2':
   continue
  else:
   print "輸入的選項(xiàng)不存在，請(qǐng)重新輸入！"
   continue

 if x == '2':
  #進(jìn)入選課信息系統(tǒng)
  Course()
  cou = raw_input('您已進(jìn)入學(xué)生選課系統(tǒng),請(qǐng)?jiān)俅屋斎脒x擇菜單:')
  print
  if cou == '1':
   xuanke()
   continue
  if cou == '2':
   continue
  else:
   print "輸入的選項(xiàng)不存在，請(qǐng)重新輸入！"
   continue

 if x == '3':
  #進(jìn)入學(xué)生選課信息表
  information()
  inf = raw_input('您已進(jìn)入學(xué)生選課信息系統(tǒng),請(qǐng)?jiān)俅屋斎脒x擇菜單:')
  print
  if inf == '1':
   stu_id_search()
   continue
  if inf == '2':
   stu_id_cou()
   continue
  if inf == '3':
   cou_id_search()
   continue
  if inf == '4':
   cou_id_stu()
   continue
  if inf == '5':
   continue
  else:
   print "輸入的選項(xiàng)不存在，請(qǐng)重新輸入！"
   continue

 if x == '4':
  print "謝謝使用！"
  exit()
 else:
  print "輸入的選項(xiàng)不存在，請(qǐng)重新輸入！"
  continue

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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