Python学生管理系统示例

import os

stus = [] # 学生信息列表(每个学生的信息以字段存储)

def add_stu(): sid = input('输入学生学号：') sname = input('输入学生姓名：') sage = input('输入学生年龄：') dict_stu = {'id': sid.strip(), 'name': sname.strip(), 'age': int(sage.strip())} stus.append(dict_stu)

def remove_stu(name): item = search_stu(name) stus.remove(item)

def search_stu(name): flag = False for s in stus: if s['name'] == name.strip(): print(s) flag = True return s if flag == False: print('该学生不存在') return None

def query_all_stu(): print('序号\tid\tname\tage') for i, stu in enumerate(stus, 1): print(i, end="") print('\t%s\t%s\t%s' % (stu['id'], stu['name'], stu['age']))

def print_menu(): print('=' * 30) print('学生管理系统'.center(30)) print('输入1：添加学生') print('输入2：查找学生') print('输入3：修改学生') print('输入4：删除学生') print('输入5：查看所有学生') print('输入6：退出')

def file_read(): try: file_name=r'stu.txt' if os.path.exists(file_name): f = open(file_name, 'r', encoding='utf-8') while True: line_text = f.readline() if line_text == "": break line_list = line_text.split() dict_item={'id':line_list[0],'name':line_list[1],'age':line_list[2]} stus.append(dict_item) print(line_list) f.close() else: print('file is not exist.')

except Exception as e:
    print(e)
finally:
    print('file_read methon is exec completed.')

def file_write(): try: file_name = r'stu.txt' if os.path.exists(file_name): os.remove(file_name) f = open(file_name, 'w', encoding='utf-8') for item in stus: line_text = "%s\t%s\t%s" % (item['id'], item['name'], item['age']) f.write(line_text) f.write('\n') f.close()

except Exception as e:
    print(e)
finally:
    print('file_write methon exec over..')

def main(): file_read() while True: print_menu() operate = input('请输入你想要的操作：') if operate == "1": add_stu() elif operate == "2": sname = input("输入学生姓名：") search_stu(sname) elif operate == "3": pass elif operate == "4": sname = input("请输入删除学生的姓名：") remove_stu(sname) elif operate == "5": query_all_stu() else: file_write() print('exit......') break

main()