学生信息管理系统--无交互界面（二）
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 break110 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 = True122 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 = True150 else:151 mark = False152 else:153 print("暂未保存数据信息。。。")154 return155 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 return203 204 ascORdesc = input("请选择（0升序；1降序）： ")205 if ascORdesc == "0":206 ascORdescBool = False207 elif ascORdesc == "1":208 ascORdescBool = True209 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)227 228 229 230 231 232 233 234 235 236 237 238 239
