1 #-*- coding:utf-8 -*-
2
3 filename = "students.txt"
4 import os
5
6 def save(student):
7 try:
8 students_txt = open(filename,"a")
9 except Exception as e:
10 students_txt = open(filename,"w")
11
12 for info in student:
13 students_txt.write(str(info)+"\n")
14 students_txt.close()
15
16 def insert():
17 studentList = []
18 mark = True
19 while mark:
20 id = input("请输入id（如1001）：")
21 if not id:
22 break
23 #查找该学号是否存在
24 with open(filename,"r") as rfile:
25 student_old = rfile.readlines()
26
27 for student in student_old:
28 item = dict(eval(student))
29 if item["id"] == id:
30 print("该学生已存在，请使用其他学号!!")
31 insert()
32 name = input("请输入名字：")
33 if not name:
34 break
35 try:
36 english = int(input("请输入英语成绩："))
37 python = int(input("请输入Python成绩:"))
38 c = int(input("请输入C语言成绩"))
39 except:
40 print("输入无效，不是整形数据............重新录入信息")
41 continue
42 student = {"id":id,"name":name,"english":english,"python":python,"c":c}
43 studentList.append(student)
44 inputMark = input("是否继续添加？(Y/N):")
45 if inputMark == "y":
46 mark = True
47 else:
48 mark = False
49 save(studentList)
50 print("学生信息录入完毕！！")
51
52 def delete():
53 mark = True
54 while mark:
55 studentId = input("请输入想要删除的学生ID：")
56 if studentId is not "":
57 if os.path.exists(filename):
58 with open(filename,"r") as rfile:
59 student_old = rfile.readlines()
60 else:
61 student_old = []
62 ifdel = False
63 if student_old:
64 with open(filename,"w") as wfile:
65 d = {}
66 for list in student_old:
67 d = dict(eval(list))
68 if d["id"] != studentId:
69 wfile.write(str(d)+"\n")
70 else:
71 ifdel = True
72 if ifdel:
73 print("ID为 %s 的学生信息已经被删除..........."%studentId)
74 else:
75 print("没有找到ID为 %s 的学生信息..."%studentId)
76 else:
77 print("无此学生信息")
78 break
79 show()
80 inputMark = input("是否继续删除？（y/n）:")
81 if inputMark == "y":
82 mark = True
83 else:
84 mark = False
85
86 def modify():
87 show()
88 if os.path.exists(filename):
89 with open(filename,"r") as rfile:
90 student_old = rfile.readline()
91 else:
92 return
93
94 studentId = input("请输出要修改的学生ID：")
95 with open(filename,"w") as wfile:
96 for student in student_old:
97 d = dict(eval(student))
98 if d["id"] == studentId:
99 print("找到了这名学生，可以修改他的信息！")
100 while True:
101 try:
102 d["name"] = input("请输入姓名：")
103 d["english"] = int(input("请输入英语成绩： "))
104 d["python"] = int(input("请输入Python成绩："))
105 d["c"] = int(input("请输入C语言成绩： "))
106 except:
107 print("您输入有误，请重新输入。")
108 else:
109 break
110 student = str(d)
111 wfile.write(student+"\n") #将修改后的学生信息写入文件
112 print("修改成功！")
113 else:
114 wfile.write(student) #将未修改的学生信息写入文件
115
116 mark = input("是否继续修改其他学生信息？（y/n）")
117 if mark == True:
118 modify() #使用回调函数
119
120 def search():
121 mark = True
122 student_query = []
123 while mark:
124 id = ""
125 name = ""
126 if os.path.exists(filename):
127 mode = input("按ID查找输入1；按学生姓名查找输入2： ")
128 if mode == "1":
129 id = input("请输入学生ID：")
130 elif mode == "2":
131 name = input("请输入学生名字： ")
132 else:
133 print("您输入的查找信息有误，请重新输入！！")
134 search()
135 with open(filename,"r") as rflie:
136 student = rflie.readlines()
137 for list in student:
138 d = dict(eval(list))
139 if id is not "":
140 if d["id"] == id:
141 student_query.append(d)
142 elif name is not "":
143 if d["name"] == name:
144 student_query.append(d)
145 show_student(student_query)
146 student_query.clear()
147 inputMark = input("是否继续查询？ (y/n):")
148 if inputMark == "y":
149 mark = True
150 else:
151 mark = False
152 else:
153 print("暂未保存数据信息。。。")
154 return
155
156 def show_student(student):
157 if not student:
158 print("无数据信息。。。。。。。。")
159 return
160 format_title = "{:^6}{:^12}\t{:^8}\t{:^26}\t{:^10}\t{:^20}"
161 print(format_title.format("ID","名字","英语成绩","Python成绩","C语言成绩","总成绩"))
162 format_data = "{:^6}{:^12}\t{:^8}\t{:^10}\t{:^10}\t{:^10}"
163 for info in student:
164 print(format_data.format(info.get("id"),info.get("name"),str(info.get("english")),\
165 str(info.get("python")),str(info.get("c")),\
166 str(info.get("english")+info.get("python")+info.get("c")).center(12)))
167
168 def total():
169 if os.path.exists(filename):
170 with open(filename,"r") as rfile:
171 student_old = rfile.readlines()
172 if student_old:
173 print("一共有 %s 名学生"%len(student_old))
174 else:
175 print("还没有录入学生信息")
176 else:
177 print("暂未保存数据信息。。")
178
179 def show():
180 student_new = []
181 if os.path.exists(filename):
182 with open(filename,"r") as rfile:
183 student_old = rfile.readlines()
184
185 for list in student_old:
186 student_new.append(eval(list))
187 if student_new:
188 show_student(student_new)
189 else:
190 print("暂未保存数据信息......")
191
192 def sort():
193 show()
194 if os.path.exists(filename):
195 with open(filename,"r") as rfile:
196 student_old = rfile.readlines()
197 student_new = []
198 for list in student_old:
199 d = dict(eval(list))
200 student_new.append(d)
201 else:
202 return
203
204 ascORdesc = input("请选择（0升序；1降序）： ")
205 if ascORdesc == "0":
206 ascORdescBool = False
207 elif ascORdesc == "1":
208 ascORdescBool = True
209 else:
210 print("您输入有误请重新输入！")
211 sort()
212
213 mode = input("请选择排列方式(1按英语成绩排序；2按Python成绩排序;3按C语言成绩排序；0按总成绩排序)： ")
214 if mode == "1":
215 student_new.sort(key=lambda x:x["english"],reverse=ascORdescBool)
216
217 elif mode == "2":
218 student_new.sort(key=lambda x:x["python"],reverse=ascORdescBool)
219 elif mode == "3":
220 student_new.sort(key=lambda x:x["c"],reverse=ascORdescBool)
221 elif mode == "0":
222 student_new.sort(key=lambda x:x["english"]+x["python"]+x["c"],reverse=ascORdescBool)
223 else:
224 print("您输入有误请重新输入！")
225 sort()
226 show_student(student_new)
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