python基础小练习 

def main():
    number = int(input("请输入学生的总人数:"))                                         # 输入要录入的学生总数
    count = number                                                                  # 用一个变量来保存这个学生总数
    students = list()                                                               # 创建一个列表来存储学生信息
    while(number):                                                                  # 进入循环
        student = {}                                                                # 学生信息列表
        name = input("请输入学生的姓名:")                                              # 输入学生姓名
        student['name'] = name                                                      # 字典赋值
        gender = input("请输入他的性别:")                                             # 输入性别
        student['gender'] = gender                                                  # 字典赋值
        students.append(student)                                                    # 将这个信息新增到列表
        number -= 1                                                                 # 学生总数-1
    print("%d 个学生信息是==========>   %s"%(count, students))                        # 循环结束，打印列表信息


if __name__ == '__main__':
    main()

# 学生信息录入展示代码

# 输入要录入的学生总数

# 录入学生基本信息

# 学生信息录入完毕展示给用户

  1 import os
  2 import re
  3 import numpy as np
  4 
  5 class Student: #定义一个学生类
  6     def __init__(self):
  7         self.name = ''
  8         self.ID =''
  9         self.score1 = 0
 10         self.score2 = 0
 11         self.score1 = 0
 12         self.sum = 0
 13 
 14 
 15 def searchByID(stulist, ID): #按学号查找看是否学号已经存在
 16     for item in stulist:
 17         if item.ID == ID:
 18             return True
 19 
 20 def Add(stulist,stu): #添加一个学生信息
 21     if searchByID(stulist, stu.ID) == True:
 22         print("学号已经存在！")
 23         return False
 24     stulist.append(stu)
 25     print( stu.name,stu.ID, stu.score1, stu.score2, stu.score3, stu.sum)
 26     print( "是否要保存学生信息？")
 27     nChoose = input("Choose Y/N")
 28     if nChoose == 'Y' or nChoose == 'y':
 29         file_object = open("students.txt", "a")
 30         file_object.write(stu.ID)
 31         file_object.write(" ")
 32         file_object.write(stu.name)
 33         file_object.write(" ")
 34         file_object.write(str(stu.score1))
 35         file_object.write(" ")
 36         file_object.write(str(stu.score2))
 37         file_object.write(" ")
 38         file_object.write(str(stu.score3))
 39         file_object.write(" ")
 40         file_object.write(str(stu.sum))
 41         file_object.write("\n")
 42         file_object.close()
 43         print( u"保存成功！")
 44 
 45 def Search(stulist, ID): #搜索一个学生信息
 46     print( "学号   姓名    语文    数学    英语    总分")
 47     count = 0
 48     for item in stulist:
 49         if item.ID == ID:
 50             print( item.ID, '\t' ,item.name,'\t', item.score1,'\t',item.score2, '\t', item.score3, '\t',item.sum)
 51             break
 52         count = 0
 53     if count == len(stulist):
 54         print( "没有该学生学号！")
 55 
 56 def Del(stulist, ID): #删除一个学生信息
 57     count = 0
 58     for item in stulist:
 59         if item.ID == ID:
 60             stulist.remove(item)
 61             print( "删除成功！")
 62             break
 63         count +=1
 64     # if count == len(stulist):
 65     #   print( "没有该学生学号！"
 66     file_object = open("students.txt", "w")
 67     for stu in stulist:
 68         print( stu.ID, stu.name, stu.score1,stu.score2, stu.score3, stu.sum)
 69         file_object.write(stu.ID)
 70         file_object.write(" ")
 71         file_object.write(stu.name)
 72         file_object.write(" ")
 73         file_object.write(str(stu.score1))
 74         file_object.write(" ")
 75         file_object.write(str(stu.score2))
 76         file_object.write(" ")
 77         file_object.write(str(stu.score3))
 78         file_object.write(" ")
 79         file_object.write(str(stu.sum))
 80         file_object.write("\n")
 81         file_object.close()
 82     #   print( "保存成功！"
 83     file_object.close()
 84 def Change(stulist, ID):
 85     count = 0
 86     for item in stulist:
 87         if item.ID == ID:
 88             stulist.remove(item)
 89             file_object = open("students.txt", "w")
 90             for stu in stulist:
 91                 #print( li.ID, li.name, li.score
 92                 file_object.write(stu.ID)
 93                 file_object.write(" ")
 94                 file_object.write(stu.name)
 95                 file_object.write(" ")
 96                 file_object.write(str(stu.score1))
 97                 file_object.write(" ")
 98                 file_object.write(str(stu.score2))
 99                 file_object.write(" ")
100                 file_object.write(str(stu.score3))
101                 file_object.write(" ")
102                 file_object.write(str(stu.sum))
103                 file_object.write("\n")
104             #   print( "保存成功！"
105             file_object.close()
106             stu = Student()
107             stu.name = input("请输入学生的姓名")
108             while True:
109                 stu.ID = input("请输入学生的ID")
110                 p = re.compile('^[0-9]{3}$')
111                 if p.match(stu.ID):
112                     break
113                 else:
114                     print( "输入的有错误！")
115             while True:
116                 stu.score1 = int(input("请输入学生语文成绩"))
117                 if stu.score1 <= 100 and stu.score1 > 0 :
118                     break
119                 else:
120                     print( "输入的学生成绩有错误！")
121             while True:
122                 stu.score2 = int(input("请输入学生数学成绩"))
123                 if stu.score2 <= 100 and stu.score2 > 0 :
124                     break
125                 else:
126                     print( "输入的学生成绩有错误！")
127             while True:
128                 stu.score3 = int(input("请输入学生英语成绩"))
129                 if stu.score3 <= 100 and stu.score3 > 0 :
130                     break
131                 else:
132                     print( "输入的学生成绩有错误！")
133             stu.sum = stu.score1 + stu.score2 + stu.score3
134             Add(stulist,stu)
135 def display(stulist): #显示所有学生信息
136     print( u"学号   姓名    语文    数学    英语    总分")
137     for item in stulist:
138         print( item.ID, '\t' ,item.name,'\t', item.score1,'\t',item.score2, '\t', item.score3, '\t',item.sum)
139 
140 def Sort(stulist): #按学生成绩排序
141     Stu = []
142     sum_count = []
143     for li in stulist:
144         temp = []
145         temp.append(li.ID)
146         temp.append(li.name)
147         temp.append(int(li.score1))
148         temp.append(int(li.score2))
149         temp.append(int(li.score3))
150         temp.append(int(li.sum))
151         sum_count.append(int(li.sum))
152         Stu.append(temp)
153 
154     #print( sum_count
155     #print( Stu;
156     #print( stulist
157     insertSort(sum_count, stulist)
158     #print( stulist;
159     display(stulist)
160 
161 def insertSort(a, stulist):
162     for i in range(len(a)-1):
163         #print( a,i
164         for j in range(i+1,len(a)):
165             if a[i]<a[j]:
166                 temp = stulist[i]
167                 stulist[i] = stulist[j]
168                 stulist[j] = temp
169     #return a
170 
171 def Init(stulist):  #初始化函数
172     print( "初始化......")
173     file_object = open('students.txt', 'r')
174     for line in file_object:
175         stu = Student()
176         line = line.strip("\n")
177         s = line.split(" ")
178         stu.ID = s[0]
179         stu.name = s[1]
180         stu.score1 = s[2]
181         stu.score2 = s[3]
182         stu.score3 = s[4]
183         stu.sum = s[5]
184         stulist.append(stu)
185     file_object.close()
186     print( "初始化成功！")
187     main()
188 
189 def main(): #主函数 该程序的入口函数
190     while True:
191         print( "*********************")
192         print( u"--------菜单---------")
193         print( u"增加学生信息--------1")
194         print( u"查找学生信息--------2")
195         print( u"删除学生信息--------3")
196         print( u"修改学生信息--------4")
197         print( u"所有学生信息--------5")
198         print( u"按照分数排序--------6")
199         print( u"退出程序------------0")
200         print( "*********************")
201 
202         nChoose = input("请输入你的选择：")
203         if nChoose == "1":
204             stu = Student()
205             stu.name = input("请输入学生的姓名")
206             while True:
207                 stu.ID = input("请输入学生的ID")
208                 p = re.compile('^[0-9]{3}$')
209                 if p.match(stu.ID):
210                     break
211                 else:
212                     print( "输入的有错误！")
213             while True:
214                 stu.score1 = int(input("请输入学生语文成绩"))
215                 if stu.score1 <= 100 and stu.score1 > 0 :
216                     break
217                 else:
218                     print( "输入的学生成绩有错误！")
219             while True:
220                 stu.score2 = int(input("请输入学生数学成绩"))
221                 if stu.score2 <= 100 and stu.score2 > 0 :
222                     break
223                 else:
224                     print( "输入的学生成绩有错误！")
225             while True:
226                 stu.score3 = int(input("请输入学生英语成绩"))
227                 if stu.score3 <= 100 and stu.score3 > 0 :
228                     break
229                 else:
230                     print( "输入的学生成绩有错误！")
231             stu.sum = stu.score1 + stu.score2 + stu.score3
232             Add(stulist,stu)
233 
234         if nChoose == '2':
235             ID = input("请输入学生的ID")
236             Search(stulist, ID)
237 
238         if nChoose == '3':
239             ID = input("请输入学生的ID")
240             Del(stulist, ID)
241         if nChoose == '4':
242             ID = input("请输入学生的ID")
243             Change(stulist, ID)
244 
245         if nChoose == '5':
246             display(stulist)
247 
248         if nChoose == '6':
249             Sort(stulist)
250 
251 
252         if nChoose == '0':
253             break
254 
255 if __name__ == '__main__':
256     stulist =[]
257 Init(stulist)
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posted @ 2018-06-29 16:44  一石数字欠我15w!!!  阅读(239)  评论(0)  编辑  收藏  举报