学生管理系统

  1 # ------------功能菜单------------
  2 #      1、录入学生信息
  3 #      2、查找学生信息
  4 #      3、删除学生信息
  5 #      4、修改学生信息
  6 #      5、排序
  7 #      6、统计学生总人数
  8 #      7、显示所有学生信息
  9 #      0、退出
 10 # --------------------------------
 11 
 12 import os
 13 #  student.txt文件创建在代码同文件下
 14 fileName = ‘student.txt‘
 15 
 16 def main():
 17     while True:
 18         nav()
 19         try:
 20             choose = int(input(‘请选择：‘))
 21             if choose in [0, 1, 2, 3, 4, 5, 6, 7]:
 22                 if choose == 0:
 23                     answer = input(‘你确定要退出系统吗？请输入y/n或 Y/N‘)
 24                     if answer ==‘y‘ or answer ==‘Y‘:
 25                         print(‘谢谢你的使用，退出系统成功‘)  # 退出系统成功
 26                         break
 27                     else:
 28                         continue
 29                 elif choose == 1:
 30                     insert()
 31                 elif choose == 2:
 32                     search()
 33                 elif choose == 3:
 34                     delete()
 35                 elif choose == 4:
 36                     modify()
 37                 elif choose == 5:
 38                     sort()
 39                 elif choose == 6:
 40                     total()
 41                 elif choose == 7:
 42                     show()
 43             else:
 44                 print(‘请输入 0, 1, 2, 3, 4, 5, 6, 7‘)
 45 
 46         except ValueError as e:
 47             print(‘输入有误！‘, e)
 48 
 49 def nav():
 50     print(‘==========学生管理系统==========‘)
 51     print(‘------------功能菜单------------‘)
 52     print(‘\t 1、录入学生信息‘)
 53     print(‘\t 2、查找学生信息‘)
 54     print(‘\t 3、删除学生信息‘)
 55     print(‘\t 4、修改学生信息‘)
 56     print(‘\t 5、排序‘)
 57     print(‘\t 6、统计学生总人数‘)
 58     print(‘\t 7、显示所有学生信息‘)
 59     print(‘\t 0、退出‘)
 60     print(‘--------------------------------‘)
 61 
 62 def insert():
 63     student_list = []
 64     while True:
 65         id = input(‘请输入ID（如10001）：‘)
 66         if not id:
 67             break
 68         name = input(‘请输入姓名：‘)
 69         if not name:
 70             break
 71         try:
 72             english = int(input(‘请输入英语成绩：‘))
 73             python = int(input(‘请输入Python成绩：‘))
 74             math = int(input(‘请输入数学成绩：‘))
 75             java = int(input(‘请输入java成绩：‘))
 76             javascript = int(input(‘请输入javascript成绩：‘))
 77         except:
 78             print(‘输入无效。请输入正确的整数类型，请重新输入‘)
 79             continue
 80         # 将录入的学生信息保存到字典中
 81         student = {‘id‘: id, ‘name‘: name, ‘english‘: english, ‘python‘: python, ‘math‘: math, ‘java‘: java, ‘javascript‘: javascript}
 82         # 将学生添加到列表当中
 83         student_list.append(student)
 84         answer = input(‘是否确认继续添加？y/n\n‘)
 85         if answer == ‘y‘ or answer == ‘Y‘:
 86             continue
 87         else:
 88             break
 89     # 调用save()函数
 90     save(student_list)
 91     print(‘学生录入完毕！！！‘)
 92 
 93 def save(lst):
 94     try:
 95         stu_txt = open(fileName, ‘a‘, encoding=‘utf-8‘)
 96     except:
 97         stu_txt = open(fileName, ‘w‘, encoding=‘utf-8‘)
 98     for item in lst:
 99         a = stu_txt.write(str(item)+‘\n‘)
100         print(a)
101     stu_txt.close()
102 
103 def search():
104     student_query = []
105     while True:
106         id = ‘‘
107         name = ‘‘
108         if os.path.exists(fileName):
109             mode = input(‘按ID查找请输入1，按姓名查找请输入2：‘)
110             if mode == ‘1‘:
111                 id = input(‘请输入学生ID：‘)
112             elif mode == ‘2‘:
113                 name = input(‘请输入学生姓名：‘)
114             else:
115                 print(‘你输入有误，请重新输入‘)
116                 search()
117             with open(fileName, ‘r‘, encoding=‘utf-8‘) as rfile:
118                 student = rfile.readlines()
119                 for item in student:
120                     d = dict(eval(item))
121                     if id != ‘‘:
122                         if d[‘id‘] == id:
123                             student_query.append(d)
124                     elif name != ‘‘:
125                         if d[‘name‘] == name:
126                             student_query.append(d)
127             # 显示查询结果
128             show_student(student_query)
129             # 清空列表
130             student_query.clear()
131             anwser = input(‘是否要继续查询？y/n‘)
132             if anwser == ‘y‘ or anwser == ‘Y‘:
133                 continue
134             else:
135                 break
136         else:
137             print(‘未查询到学生信息！‘)
138             return
139 
140 def show_student(lst):
141     if len(lst) == 0 :
142         print(‘没有查询到学生信息，无数据显示！！！‘)
143         return
144     # 定义标题显示格式
145     format_title = ‘{:^6}\t{:^12}\t{:^12}\t{:^12}\t{:^12}\t{:^12}\t{:^12}\t{:^12}‘
146     print(format_title.format(‘ID‘, ‘姓名‘, ‘英语成绩‘, ‘Python成绩‘, ‘数学成绩‘, ‘java成绩‘, ‘javascript成绩‘, ‘总成绩‘))
147     # 定义显示内
148     format_data = ‘{:^6}\t{:^12}\t{:^12}\t{:^12}\t{:^12}\t{:^12}\t{:^12}\t{:^12}‘
149     for item in lst:
150         print(
151             format_data.format(
152                 item.get(‘id‘),
153                 item.get(‘name‘),
154                 item.get(‘english‘),
155                 item.get(‘python‘),
156                 item.get(‘math‘),
157                 item.get(‘java‘),
158                 item.get(‘javascript‘),
159                 int(item.get(‘english‘)) + int(item.get(‘python‘)) + int(item.get(‘math‘)) + int(item.get(‘java‘)) + int(item.get(‘javascript‘))
160             )
161         )
162 
163 def delete():
164     while True:
165         student_id = input(‘请输入要删除学生的ID：‘)
166         if student_id != ‘‘:
167             if os.path.exists(fileName):
168                 with open(fileName, ‘r‘, encoding=‘utf-8‘) as file:
169                     student_old = file.readlines()
170             else:
171                 student_old = []
172             flag = False        # 标记是否删除
173             if student_old:
174                 with open(fileName, ‘w‘, encoding=‘utf-8‘) as wfile:
175                     d = {}
176                     for item in student_old:
177                         d = dict(eval(item))    # 将字符转换为字典
178                         if d[‘id‘] != student_id:
179                             wfile.write(str(d) + ‘\n‘)
180                         else:
181                             flag = True
182                     if flag:
183                         print(‘id为‘,student_id,‘的学生信息已经被删除‘)
184                     else:
185                         print(‘没有找到ID为‘,student_id,‘的学生信息‘)
186             else:
187                 print(‘无学生信息‘)
188                 break
189             show()  # 删除之后要重新显示所有学生信息
190             answer = input(‘是否确认继续添加？y/n\n‘)
191             if answer == ‘y‘ or answer ==‘Y‘:
192                 continue
193             else:
194                 break
195         else:
196             print(‘请输入数据‘)
197             break
198 
199 def modify():
200     show()
201     if os.path.exists(fileName):
202         with open(fileName, ‘r‘, encoding=‘utf-8‘) as rfile:
203             student_old = rfile.readlines()
204     else:
205         return
206     student_id = input(‘请输入要修改学员的ID：‘)
207     with open(fileName, ‘w‘, encoding=‘utf-8‘) as wfile:
208         for item in student_old:
209             d = dict(eval(item))
210             try:
211 
212                 if d[‘id‘] == student_id:
213                     print(‘找到学生信息，可以修改他的相关信息了！‘)
214                     while True:
215                         try:
216                             d[‘name‘] = input(‘请输入姓名：‘)
217                             d[‘english‘] = input(‘请输入英语成绩：‘)
218                             d[‘python‘] = input(‘请输入Python成绩：‘)
219                             d[‘math‘] = input(‘请输入数学成绩：‘)
220                             d[‘java‘] = input(‘请输入java成绩：‘)
221                             d[‘javascript‘] = input(‘请输入javascript成绩：‘)
222                         except:
223                             print(‘输入的数据有误，请重新输入！‘)
224                         else:
225                             break
226                     wfile.write(str(d)+‘\n‘)
227                     print(‘修改成功！‘)
228                 else:
229                     wfile.write(str(d)+‘\n‘)
230                     print(‘未查询到你输入的ID值！‘)
231             except:
232                 print(‘输入的数据有误，请重新输入！‘)
233 
234         answer = input(‘是否继续修改其他学生信息？y/n或者Y/N‘)
235         if answer == ‘y‘ or answer == ‘Y‘:
236             modify()
237 
238 def sort():
239     show()
240     if os.path.exists(fileName):
241         with open(fileName, ‘r‘, encoding=‘utf-8‘) as rfile:
242             student_list = rfile.readlines()
243         student_new = []
244         for item in student_list:
245             d = dict(eval(item))
246             student_new.append(d)
247     else:
248         return
249 
250     asc_or_desc = input(‘请选择（0.升序，1.降序）：‘)
251     if asc_or_desc == ‘0‘:
252         asc_or_desc_bool = False
253     elif asc_or_desc == ‘1‘:
254         asc_or_desc_bool = True
255     else:
256         print(‘你的输入有误，请重新输入‘)
257         sort()
258     mode = input(
259         ‘请选择排序方式（1.按English排序 2.按python排序 3.按math排序 4.按java排序 5.按javaScript排序 6.按总成绩排序）‘
260     )
261     if mode == ‘1‘:
262         student_new.sort(key=lambda x: int(x[‘english‘]), reverse=asc_or_desc_bool)
263     elif mode == ‘2‘:
264         student_new.sort(key=lambda x: int(x[‘python‘]), reverse=asc_or_desc_bool)
265     elif mode == ‘3‘:
266         student_new.sort(key=lambda x: int(x[‘math‘]), reverse=asc_or_desc_bool)
267     elif mode == ‘4‘:
268         student_new.sort(key=lambda x: int(x[‘java‘]), reverse=asc_or_desc_bool)
269     elif mode == ‘5‘:
270         student_new.sort(key=lambda x: int(x[‘javascript‘]), reverse=asc_or_desc_bool)
271     elif mode == ‘6‘:
272         student_new.sort(key=lambda x: int(x[‘english‘]) + int(x[‘python‘]) + int(x[‘math‘]) + int(x[‘java‘]) + int(x[‘javascript‘]), reverse=asc_or_desc_bool)
273     else:
274         print(‘输入的排序方式有误！‘)
275         sort()
276     show_student(student_new)
277 
278 
279 def total():
280     if os.path.exists(fileName):
281         with open(fileName, ‘r‘, encoding=‘utf-8‘) as rfile:
282             students = rfile.readlines()
283             if students:
284                 print(‘共有‘,len(students),‘名学生‘)
285             else:
286                 print(‘还没有录入学生信息‘)
287     else:
288         print(‘暂未保存数据信息......‘)
289 
290 
291 
292 def show():
293     student_list = []
294     if os.path.exists(fileName):
295         with open(fileName, ‘r‘, encoding=‘utf-8‘) as rfile:
296             students = rfile.readlines()
297             for item in students:
298                 student_list.append(eval(item))
299             if student_list:
300                 show_student(student_list)
301 
302     else:
303         print(‘暂未保存数据......‘)
304 
305 if __name__ == ‘__main__‘:
306     main()
307 
308 # 打包 pyinstaller -F E:\workspace\Python\0基础学python练习\sty\students\stusystem.py