ADD file via upload

student_information.py

@@ -0,0 +1,187 @@
+import os.path
+
+filename = 'student.txt'
+
+
+def menu():
+    print('======学生信息管理系统======')
+    print('1.输入学生信息')
+    print('2.查找信息')
+    print('3.删除信息')
+    print('4.修改信息')
+    print('5.显示出所有信息')
+    print('0.退出系统')
+    print('=========================')
+
+
+def main():
+    while True:
+        menu()
+        selection = int(input('请选择:'))
+        if selection in [0, 1, 2, 3, 4, 5]:
+            if selection == 0:
+                ans = input('是否要退出？y/n')
+                if ans == 'y' or ans == 'Y':
+                    print('感谢使用!!')
+                    break
+                else:
+                    continue
+            elif selection == 1:
+                insert()
+            elif selection == 2:
+                search()
+            elif selection == 3:
+                delete()
+            elif selection == 4:
+                edit()
+            elif selection == 5:
+                display()
+        else:
+            print('选择错误')
+
+
+# noinspection PyBroadException
+def insert():
+    student_list = []
+    while True:
+        stu_id = input('请输入学号:')
+        name = input('请输入姓名:')
+        sex = input('请输入性别:')
+        phone = int(input('请输入电话号码:'))
+        student = {'stu_id': stu_id, 'name': name, 'sex': sex, 'phone': phone}
+        student_list.append(student)
+        ans = input('是否继续添加y/n\n')
+        if ans == 'y' or ans == 'Y':
+            continue
+        else:
+            break
+    save(student_list)
+    print('输入完毕!')
+
+
+# noinspection PyBroadException
+def save(lst):
+    try:
+        stu_txt = open(filename, 'a', encoding='utf-8')
+    except:
+        stu_txt = open(filename, 'w', encoding='utf-8')
+    for item in lst:
+        stu_txt.write(str(item) + '\n')
+    stu_txt.close()
+
+
+def search():
+    stu_query = []
+    while True:
+        stu_id = ''
+        if os.path.exists(filename):
+            id = input('请输入学生学号:')
+            with open(filename, 'r', encoding='utf-8') as rfile:
+                student = rfile.readlines()
+                for item in student:
+                    d = dict(eval(item))
+                    if id != '':
+                        if d['stu_id'] == id:
+                            stu_query.append(d)
+            show_student(stu_query)
+            stu_query.clear()
+            ans = input('是否继续查询?y/n')
+            if ans == 'y':
+                continue
+            else:
+                break
+        else:
+            print('暂无学生信息')
+            return
+
+
+def show_student(lst):
+    if len(lst) == 0:
+        print('没有查询到数据！')
+        return
+    format_title = '{:^6}\t{:^12}\t{:^8}\t{:^15}\t'
+    print(format_title.format('ID', '姓名', '性别', '电话'))
+    format_data = '{:^6}\t{:^12}\t{:^8}\t{:^15}\t'
+    for item in lst:
+        print(format_data.format(item.get('stu_id'),
+                                 item.get('name'),
+                                 item.get('sex'),
+                                 item.get('phone')
+                                 ))
+
+def delete():
+    while True:
+        stu_id = input('请输入要删除的学号：')
+        if stu_id != '':
+            if os.path.exists(filename):
+                with open(filename, 'r', encoding='utf-8') as file:
+                    stu_old = file.readlines()
+            else:
+                stu_old = []
+            flag = False
+            if stu_old:
+                with open(filename, 'w', encoding='utf-8') as wfile:
+                    d = {}
+                    for item in stu_old:
+                        d = dict(eval(item))
+                        if d['stu_id'] != stu_id:
+                            wfile.write(str(d) + '\n')
+                        else:
+                            flag = True
+                    if flag:
+                        print(f'id为{stu_id}的学生信息已经被删除')
+                    else:
+                        print(f'没有找到{stu_id}的学生信息')
+            else:
+                print('无学生信息')
+                break
+            display()
+            ans = input('是否继续删除？y/n\n')
+            if ans == 'y' or ans == 'Y':
+                continue
+            else:
+                break
+
+
+def edit():
+    display()
+    if os.path.exists(filename):
+        with open(filename, 'r', encoding='utf-8') as rfile:
+            student_old = rfile.readlines()
+    else:
+        return
+    student_id = input('请输入要修改的学生学号：')
+    with open(filename, 'w', encoding='utf-8') as wfile:
+        for item in student_old:
+            d = dict(eval(item))
+            if d['stu_id'] == student_id:
+                print('已经找到学生信息，请修改：')
+                while True:
+
+                        d['name'] = input('请输入姓名')
+                        d['sex'] = input('请输入性别')
+                        d['phone'] = input('请输入电话')
+                wfile.write(str(d) + '\n')
+                print('修改成功')
+            else:
+                wfile.write(str(d) + '\n')
+        ans = input('是否继续修改？y/n')
+        if ans == 'y':
+            edit()
+
+
+def display():
+    student_list = []
+    if os.path.exists(filename):
+        with open(filename, 'r', encoding='utf-8') as rfile:
+            students = rfile.readlines()
+            for item in students:
+                student_list.append(eval(item))
+            if student_list:
+                show_student(student_list)
+    else:
+        print('没有学生信息')
+
+
+if 1 == 1:
+    main()