学生信息管理系统 桃扇骨 2023-01-07 05:53 142阅读 0赞 #!/usr/bin/env python # -*- coding: utf-8 -*- # author： {敢问路在何方} # ide： PyCharm import re, os def main(): ctrl = True while (ctrl): menu() option = input("请选择：") option_str = re.sub("\D", "", option) if option_str in ['0', '1', '2', '3', '4', '5', '6', '7']: option_int = int(option_str) if option_int == 0: print('您以退出学生管理系统！') ctrl = False elif option_int == 1: insert() elif option_int == 2: search() elif option_int == 3: delelt() elif option_int == 4: modify() elif option_int == 5: sort() elif option_int == 6: total() elif option_int == 7: show() def menu(): print(''' ----------------学生信息管理系统---------------- | | | | | ============== 功能菜单 ============== | | 1 录入学生信息 | | 2 查找学生信息 | | 3 删除学生信息 | | 4 修改学生信息 | | 5 排序 | | 6 统计学生总人数 | | 7 显示所有学生信息 | | 0 推出系统 | | ======================================== | | 说明:通过数字或上下方向键选择菜单 | ----------------------------------------------- ''') filename = "students.txt" def save(student): try: students_txt = open(filename, "a") except Ellipsis as e: students_txt = open(filename, "w") for info in student: students_txt.write(str(info) + "\n") students_txt.close() def insert(): studentlist = [] make = True while make: id = input("请输入ID（例如1001）:") if not id: break name = input("请输入名字:") if not name: break try: english = int(input("请输入英语成绩")) python = int(input("请输入python成绩")) c = int(input("请输入C语言成绩")) except: print("输入成绩无效，不是整数，请重新录入信息") continue student = {'id': id, 'name': name, 'english': english, 'python': python, 'c': c} studentlist.append(student) inputMake = input('是否继续添加？(y/n):') if inputMake == 'y': make = True else: make = False save(studentlist) print("学生信息录入完毕！！！") def search(): make = True student_query = [] while make: id = "" name = "" if os.path.exists(filename): mode = input("按ID查询输入1，按姓名查询请按2：") if mode == "1": id = input("请输入学生ID:") elif mode == "2": name = input("请输入学生姓名:") else: print("输入有误，请重新输入:") search() with open(filename, 'r') as file: student = file.readlines() for list in student: d = dict(eval(list)) if id is not "": if d["id"] == id: student_query.append(d) elif name is not "": if d["name"] == name: student_query.append(d) show_student(student_query) student_query.clear() inputMark = input("是否继续查询? (y/n) :") if inputMark == "y": make = True else: make = False else: print("暂未保存数据信息") return def show_student(studentList): if not studentList: print("(o@.@o)无数据信息(o@.@o）\n") return format_title = "{:^6}{:^12}\t{:^8}\t{:^10}\t{:^10}\t{:^10}" print(format_title.format("ID", "名字", "英语成绩", "Python成绩", "C语言成绩", "总成绩")) format_data = "{:^6}{:^12}\t{:^12}\t{:^12}\t{:^12}\t{:^12}" for info in studentList: print(format_data.format(info.get("id"), info.get("name"), str(info.get("english")), str(info.get("python")), str(info.get("c")), str(info.get("english") + info.get("python") + info.get("c")).center(12))) def delelt(): make = True while make: studentId = input("请输入要删除的学生ID:") if studentId is not "": if os.path.exists(filename): with open(filename, "r") as rfile: student_old = rfile.readlines() else: student_old = [] ifdel = False if student_old: with open(filename, 'w') as wfile: d = {} for list in student_old: d = dict(eval(list)) if d['id'] != studentId: wfile.write(str(d) + "\n") else: ifdel = True if ifdel: print('ID为 %s 的学生信息已经被删除...' % studentId) else: print('没有找到ID为 %s 的学生信息' % studentId) else: print('无学生信息...') break show() inputMark = input('是否继续删除? (y/n) :') if inputMark == "y": make = True else: make = False def modify(): show() if os.path.exists(filename): with open(filename, "r") as rfile: student_old = rfile.readlines() else: return studentid = input("请输入有要修改的学生ID:") with open(filename, "w") as wfile: for student in student_old: d = dict(eval(student)) if d['id'] == studentid: print("找到学生了，可以修改他的信息") while True: try: d['name'] = input("请输入姓名:") d['english'] = int(input("请输入英语成绩:")) d['python'] = int(input("请输入python成绩:")) d['c'] = int(input("请输入c语言成绩:")) except: print('输入有误，请重新输入...') else: break student = str(d) wfile.write(student + "\n") print("修改成功") else: wfile.write(student) make = input("是否继续修改其他学生信息? (y/n) :") if make == "y": modify() def sort(): show() if os.path.exists(filename): with open(filename, "r") as file: student_old = file.readlines() student_new = [] for list in student_old: d = dict(eval(list)) student_new.append(d) else: return ascORdesc = input("请选择(0升序,1降序)") if ascORdesc == "0": ascORdescBool = False elif ascORdesc == "1": ascORdescBool = True else: print("输入有误！") sort() mode = input("请输入排序方式(0按总成绩排序，1按英语成绩排序，2按Python成绩排序，3按c语言成绩排序)") if mode == "1": student_new.sort(key=lambda x: x["english"], reverse=ascORdescBool) elif mode == "2": student_new.sort(key=lambda x: x["python"], reverse=ascORdescBool) elif mode == "3": student_new.sort(key=lambda x: x["c"], reverse=ascORdescBool) elif mode == "0": student_new.sort(key=lambda x: x["english"] + x["python"] + x['c'], reverse=ascORdescBool) else: print("您的输入有误，请重新输入!!!") sort() show_student(student_new) def total(): if os.path.exists(filename): with open(filename, "r") as rfile: student_old = rfile.readlines() if student_old: print("一共有 %d 名学生！" % len(student_old)) else: print("还没有录入学生信息!") else: print("暂未保存数据信息") def show(): student_new = [] if os.path.exists(filename): with open(filename, "r") as rfile: student_old = rfile.readlines() for i in student_old: student_new.append(eval(i)) if student_new: show_student(student_new) else: print("暂未保存数据信息...") if __name__ == '__main__': main()
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