（跟随Python项目开发案例集锦的一次学习，故记录）
import os
import requests
import re
import json
# -------------------------------------全局变量--------------------------------------------------------------------------
filename = "student.txt"
# ------------------------------------------------我想骚一点不好意思---------------------------------------------------
class colors:
PINK = '\033[95m'
BLUE = '\033[94m'
GREEN = '\033[92m'
YELLOW = '\033[93m'
RED = '\033[91m'
END = '\033[0m'
# -----------------------------------登录界面获取cookie------------------------------------------
def menu():
# 菜单
print("""
————————————————————学生信息管理系统——————————————————————
===========功能菜单===========
1.录入信息
2.查找信息
3.删除信息
4.修改信息
5.排序
6.统计总人数
7.显示所有学生信息
=============================
————————————————————没有感情的分界线————————————————————————
""")
# 将学生信息保存
def save(student):
try:
student_txt = open(filename, 'a')
except Exception as e:
student_txt = open(filename, 'w')
for info in student:
student_txt.write(str(info) + "\n")
student_txt.close()
def insert():
studentList = []
mark = True
while mark:
id = input("请输入ID：")
if not id: # id为空则跳出循环
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("输入无效，非整数型数据，请重新输入")
continue
# 将信息保存到字典
student = {"id": id, "name": name, "english": english, "python": python, "c": c}
studentList.append(student)
inputMark = input("是否继续添加？（y/n）：")
if inputMark == "y":
mark = True
else:
mark = False
save(studentList)
print("本次信息录入完毕")
def delete():
mark = True
while mark:
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 f:
student_old = f.readlines()
else:
student_old = []
ifdel = False # 标记是否删除
if student_old:
with open(filename, 'w') as f:
d = {}
for list in student_old:
d = dict(eval(list))
if d['id'] != studentId:
f.write(str(d) + "\n")
else:
ifdel = True
if ifdel:
print(f'ID为{studentId}的学生信息已被删除')
else:
print(f'没有找到ID为{studentId}的学生信息')
else:
print("无学生信息")
break
show()
inputMark = input("是否继续删除？（y/n）：")
if inputMark == "y":
mark = True
else:
mark = False
def modify():
show()
if os.path.exists(filename):
with open(filename, 'r') as f:
student_old = f.readlines()
else:
return
studentid = input("请输入要修改的学生ID：")
with open(filename, 'w') as f:
for student in student_old:
d = dict(eval(student))
if d['id'] == studentid:
print("学生存在，可以修改其信息！")
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("输入错误，请重新输入")
else:
break
student = str(d)
f.write(student + '\n')
print("修改成功")
else:
f.write(student)
inputMark = input("是否继续修改其他人信息？（y/n）：")
if inputMark == "y":
modify()
def search():
mark = True
student_query = []
while mark:
id = ""
name = ""
if os.path.exists(filename):
mode = input("按照ID查找输入1，姓名输入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 f:
student = f.readlines()
for i in student:
d = dict(eval(i))
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":
mark = True
else:
mark = False
else:
print("暂无保存的数据信息...")
return
# 将保存在列表中的学生信息显示出来
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 i in studentList:
print(format_data.format(i.get('id'),str(i.get('name')) ,str(i.get('english')), str(i.get('python'))
, str(i.get('c')), str(i.get('english') + i.get('python') + i.get('c')).center(12)))
def total():
if os.path.exists(filename):
with open(filename, 'r') as f:
student_old = f.readlines()
if student_old:
print(f'一共有{len(student_old)}名学生') # 因为文件读取返回一个列表
else:
print("暂未保存数据信息")
def show():
student_new = []
if os.path.exists(filename):
with open(filename, 'r') as f:
student_old = f.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...")
def sort():
show()
if os.path.exists(filename):
with open(filename, 'r') as f:
student_old = f.readlines()
student_new = []
for i in student_old:
d = dict(eval(i))
student_new.append(d)
else:
return
order = input("请选择（0升序；1降序）：")
if order == '0':
orderBool = False
elif order == '1':
orderBool = True
else:
print("无效数据，请重新输入")
sort()
mode = input("请选择排序方式（1按英语成绩；2按Python成绩；3按C语言成绩；4按总成绩）")
if mode == '1':
student_new.sort(key=lambda x: x['english'], reverse=orderBool)
elif mode == '2':
student_new.sort(key=lambda x: x['python'], reverse=orderBool)
elif mode == '3':
student_new.sort(key=lambda x: x['c'], reverse=orderBool)
elif mode == '4':
student_new.sort(key=lambda x: x['english'] + x['python'] + x['c'], reverse=orderBool)
def main():
condition = True
while condition:
menu()
option = input("请选择功能：")
option_str = re.sub(r'\D', "", option) # \D代表非数字，防止键盘错误输入
if option_str in ['0', '1', '2', '3', '4', '5', '6', '7']:
option_int = int(option_str)
if option_int == 0:
print("您已经退出学生信息管理系统")
condition = False
elif option_int == 1: # 学生信息的录入
insert()
elif option_int == 2:
search()
elif option_int == 3:
delete()
elif option_int == 4:
modify()
elif option_int == 5:
sort()
elif option_int == 6:
total()
elif option_int == 7:
show()
if __name__ == '__main__':
main()
