python實(shí)現(xiàn)學(xué)生管理系統(tǒng)

#!/usr/local/bin/python 
# -*- coding:utf-8 -*- 
 
import os 
import re 
 
#定義學(xué)生類 
class Student: 
 def __init__(self): 
  self.name = '' 
  self.ID = '' 
  self.score = 0 
 
#根據(jù)學(xué)生分?jǐn)?shù)進(jìn)行從大到小的冒泡排序 
def BuddleSortByScore( stulist ): 
 n = len( stulist ) 
 for i in range( n ): 
  for j in range( n - i - 1): 
   if stulist[j].score < stulist[j+1].score: 
    #tmp = stulist[j+1] 
    #stulist[j+1] = stulist[j] 
    #stulist[j] = tmp 
    stulist[j],stulist[j+1] = stulist[j+1],stulist[j] 
 
#按順序輸出所有學(xué)生的信息 
def PrintAllStudentInfo( stulist ): 
 print u"______________________學(xué)生列表_______________" 
 for i in range( len(stulist) ): 
  print u"姓名:" , 
  print stulist[i].name, 
  print " " , 
  print u"學(xué)號:" , 
  print stulist[i].ID , 
  print " " , 
  print u"分?jǐn)?shù)：" , 
  print stulist[i].score 
 print "____________________________________________" 
 
#增加一個(gè)學(xué)生,增加成功返回True，否則返回False 
def Add( stulist , stu ): 
 if searchByID( stulist , stu.ID ) == 1: 
  print u"此ID已經(jīng)存在！" 
  return False 
 stulist.append( stu ) 
 
 #給出是否保存更新數(shù)據(jù)的選擇 
 print "Do you want to save the result ?" 
 nChoose = raw_input("Choose:Y/N:") 
  
 if nChoose == 'Y' or nChoose == 'y': 
  #將改變后的結(jié)果寫入文件中,追加寫文件 
  file_object = open("students.txt","a") 
  file_object.write( stu.ID ) 
  file_object.write( " " ) 
  file_object.write( stu.name ) 
  file_object.write( " " ) 
  file_object.write( str(stu.score) ) 
  file_object.write( "\r\n" ) 
  file_object.close() 
  return True 
 else: 
  stulist.remove(stu) 
 
#根據(jù)ID刪除一個(gè)學(xué)生的信息，刪除成功則返回True，否則返回false 
def DeleteByID( stulist , ID ): 
 for stu in stulist: 
  if stu.ID == ID: 
   stulist.remove( stu ) 
 
   #選擇是否保存已經(jīng)改變的內(nèi)容 
   print "Do you want to save the changed result ?" 
   nChoose = raw_input("Choose:Y/N:") 
    
   if nChoose == 'Y' or nChoose == 'y': 
    file_object = open("students.txt" , "w+") 
    for stu2 in stulist: 
     file_object.write(stu2.ID) 
     file_object.write(" ") 
     file_object.write(stu2.name) 
     file_object.write(" ") 
     file_object.write(str(stu2.score)) 
     file_object.write("\r\n") 
    file_object.close() 
    print u"刪除成功!" 
   return True 
 print u"刪除失敗!" 
 return False 
 
 
#根據(jù)姓名刪除一個(gè)學(xué)生的信息，刪除成功返回True,否則返回False 
def DeleteByName( stulist , name ): 
 pos = searchByName( stulist , name ) 
 if pos != -1: 
  del stulist[pos] 
 
  #選擇是否保存已經(jīng)改變的內(nèi)容 
  print "Do you want to save the changed result ?" 
  nChoose = raw_input("Choose:Y/N:") 
    
  if nChoose == 'Y' or nChoose == 'y': 
    file_object = open("students.txt" , "w+") 
    for stu2 in stulist: 
     file_object.write(stu2.ID) 
     file_object.write(" ") 
     file_object.write(stu2.name) 
     file_object.write(" ") 
     file_object.write(str(stu2.score)) 
     file_object.write("\r\n") 
    file_object.close() 
    print u"刪除成功!" 
  return True 
 else: 
  print u"刪除失敗!" 
  print pos 
  return False 
 
 
#根據(jù)學(xué)號查找一個(gè)學(xué)生是否存在,存在返回學(xué)生在列表中的下標(biāo)，否則返回-1 
def searchByID( stulist , ID ): 
 for i in range( len(stulist) ): 
  if stulist[i].ID == ID: 
   print u"姓名：" , 
   print stulist[i].name , 
   print " " , 
   print u"學(xué)號:" , 
   print stulist[i].ID , 
   print " " , 
   print u"分?jǐn)?shù):" , 
   print stulist[i].score 
   return i 
 return -1 
 
#根據(jù)姓名查找一個(gè)學(xué)生是否存在，存在返回學(xué)生在列表中的下標(biāo),否則返回-1 
def searchByName( stulist , name ): 
 for i in range( len(stulist) ): 
  if stulist[i].name == name: 
   print u"姓名：" , 
   print stulist[i].name , 
   print " " , 
   print u"學(xué)號:" , 
   print stulist[i].ID , 
   print " " , 
   print u"分?jǐn)?shù):" , 
   print stulist[i].score 
   return i 
 return -1 
 
#初始化，讀取文件，更新學(xué)生信息 
def Init( stulist ): 
 print u"初始化......" 
  
 file_object = open("students.txt","r") 
 
 #按行讀取文件中學(xué)生的信息 
 for line in file_object: 
  stu = Student() 
  line = line.strip("\n") 
  s = line.split(" ") 
  stu.ID = s[0] 
  stu.name = s[1] 
  stu.score = s[2] 
  stulist.append(stu) 
 print u"初始化成功!" 
       
 
#查找菜單 
def QueryMenu( stulist ): 
 while True: 
  print "******************************" 
  print u"根據(jù)學(xué)生的學(xué)號進(jìn)行查找-------1" 
  print u"根據(jù)學(xué)生的姓名進(jìn)行查找-------2" 
  print u"離開查找模塊----------------3" 
  print "******************************" 
 
  nChoose = raw_input("請輸入你的選擇") 
 
  if nChoose == "1": 
   ID = raw_input("請輸入你要輸入查找的ID:") 
   searchByID( stulist , ID ) 
  elif nChoose == "2": 
   name = raw_input("請輸入你要查找的姓名:") 
   searchByName( stulist , name ) 
  elif nChoose == "3": 
   return 
  else: 
   print u"選擇輸入錯(cuò)誤，請重新輸入!" 
    
#刪除模塊 
def DeleteMenu( stulist ): 
 while True: 
  print "*****************************" 
  print u"根據(jù)學(xué)生的學(xué)號進(jìn)行刪除------1" 
  print u"根據(jù)學(xué)生的姓名進(jìn)行刪除------2" 
  print u"離開刪除模塊---------------3" 
  print "******************************" 
 
  nChoose = raw_input("請進(jìn)行選擇:") 
 
  if nChoose == "1": 
   ID = raw_input("請輸入你要刪除的ID:") 
   DeleteByID( stulist , ID ) 
  elif nChoose == "2": 
   name = raw_input("請輸入你要刪除的姓名:") 
   DeleteByName( stulist , name ) 
  elif nChoose == "3": 
   return 
  else: 
   print u"您的選擇有誤，請重新輸入！" 
    
       
#菜單 
def menu( stulist ): 
 while True: 
  print "***********************" 
  print u"--------菜單------------" 
  print u"增加學(xué)生信息---------1" 
  print u"查找一個(gè)學(xué)生的信息----2" 
  print u"刪除一個(gè)學(xué)生的信息----3" 
  print u"輸出所有學(xué)生的信息----4" 
  print u"根據(jù)分?jǐn)?shù)排序---------5" 
  print u"退出程序-------------6" 
  print "------------------------" 
  print "************************" 
 
  nChoose = raw_input("請輸入你的選擇:") 
   
  if nChoose == "1": 
   stu = Student() 
   stu.name = raw_input("請輸入學(xué)生的姓名：") 
 
   #匹配學(xué)生ID是否滿足0--9中的數(shù)字 
   while True: 
    stu.ID = raw_input("請輸入學(xué)生的ID:") 
    #創(chuàng)建編譯一個(gè)正則表達(dá)式的模板 
    p = re.compile( '^[0-9]{3}$' ) 
    if p.match( stu.ID ): 
     break 
    else: 
     print "學(xué)生的ID輸入錯(cuò)誤，正確形式應(yīng)該為0--9之間的三位數(shù)字!" 
 
   #匹配學(xué)生的分?jǐn)?shù)是否滿足0--100之間 
   while True:  
    stu.score = eval( raw_input("請輸入學(xué)生的分?jǐn)?shù)：") ) 
    #利用普通的符號來判斷分?jǐn)?shù)是否符合標(biāo)準(zhǔn) 
    #if stu.score >= 0 and stu.score <= 100: 
    # break 
    #利用正則表達(dá)式來判斷分?jǐn)?shù)是否符合標(biāo)準(zhǔn) 
    if re.match( "^[0-9]" ,str(stu.score) ) and stu.score<=100 and    stu.score >= 0 : 
     break 
    else: 
     print u"分?jǐn)?shù)不滿足實(shí)際情況，應(yīng)該為0--100之間的數(shù)字!" 
 
   if Add( stulist , stu ) == 1: 
    print u"學(xué)生信息增加成功!" 
   else: 
    print u"學(xué)生信息增加失敗!" 
  elif nChoose == "2": 
   QueryMenu( stulist ) 
  elif nChoose == "3": 
   DeleteMenu( stulist ) 
  elif nChoose == "4": 
   PrintAllStudentInfo( stulist ) 
  elif nChoose == "5": 
   BuddleSortByScore( stulist ) 
 
   print "Do you want to save the sorted result?" 
   choose = raw_input("please input your choice:Y/N:") 
   if choose == 'Y' or choose == 'y': 
    file_object = open("students.txt","w+") 
    for stu2 in stulist: 
     file_object.write(stu2.ID) 
     file_object.write(" ") 
     file_object.write(stu2.name) 
     file_object.write(" ") 
     file_object.write(str(stu2.score)) 
     file_object.write("\r\n") 
  elif nChoose == "6": 
   return 
  else: 
   print u"輸入有誤，請重新輸入！" 
    
#測試函數(shù)部分 
if __name__ == '__main__': 
 #定義一個(gè)列表用來存儲所有學(xué)生的信息 
 stulist = [] 
  
 #初始化，從文件中讀取信息 
 Init( stulist ) 
  
 #菜單函數(shù) 
 menu( stulist )