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3.python小项目：学生选课系统
学生选课系统
编程核心：在对象中封装对象
目录结构：
1.administrator.py
import random
import os
import sys
sys.path.append(os.path.dirname(os.path.dirname(__file__)))
import time
import pickle
from lib import models
from config import settings
from lib.models import * # 全部导入
def login(user, pwd):
‘‘‘
登录，登录成功后：选择是创建老师，创建课程
:param user:
:param pwd:
:return:返回1：为密码错误，返回2：用户不存在
‘‘‘
if os.path.exists(os.path.join(settings.BASE_ADMIN_DIR, user)):
admin_obj = pickle.load(open(os.path.join(settings.BASE_ADMIN_DIR, user), ‘rb‘)) # 拿到对象
if admin_obj.login(user, pwd):
print(‘登陆成功‘)
while True:
sel = input(‘1.创建老师；2.创建课程‘)
if sel == ‘1‘:
create_teacher(admin_obj)
elif sel == ‘2‘:
create_course(admin_obj)
else:
break
else:
return 1
else:
return 0
def register(user, pwd):
‘‘‘
注册
:param user:
:param pwd:
:return:
‘‘‘
admin_obj = models.Admin()
admin_obj.register(user, pwd)
def create_teacher(admin_obj):
teacher_list = []
while True:
teacher_name = input(‘请输入老师的名字（q退出）：‘)
if teacher_name == ‘q‘:
break
teacher_age = input(‘请输入老师的年龄：‘)
obj = models.Teacher(teacher_name, teacher_age, admin_obj)
teacher_list.append(obj) # 将老师对象塞到列表中，再序列化
if os.path.exists(settings.TEACHER_DE_DIR):
exists_list = pickle.load(open(settings.TEACHER_DE_DIR, ‘rb‘))
teacher_list.extend(exists_list) # 将已经存在的列表批量添加到当前列表
pickle.dump(teacher_list, open(settings.TEACHER_DE_DIR, ‘wb‘))
def create_course(admin_obj):
teacher_list = pickle.load(open(settings.TEACHER_DB_DIR, ‘rb‘))
for num, item in enumerate(teacher_list, 1):
print(num, item.name, item.age, item.create_time, item.create_admin.username)
course_list = []
while True:
name = input(‘请输入课程名称(q退出)‘)
if name == ‘q‘:
break
cost = input(‘输入课时费‘)
num = input(‘选择老师（序号）‘)
obj = models.Course(name, cost, teacher_list[int(num) - 1], admin_obj)
course_list.append(obj)
if os.path.exists(settings.COURSE_DB_DIR):
exists_list = pickle.load(open(settings.COURSE_DB_DIR, ‘rb‘))
course_list.extend(exists_list) # 将已经存在的列表批量添加到当前列表
pickle.dump(course_list, open(settings.COURSE_DB_DIR, ‘wb‘))
def main():
inp = input(‘1.管理员登录 2.管理员注册； \n >>>‘)
user = input(‘请输入用户名：‘)
pwd = input(‘请输入密码：‘)
if inp == ‘1‘:
ret = login(user, pwd)
if ret == 1:
print(‘密码错误‘)
elif ret == 0:
print(‘用户不存在‘)
elif inp == ‘2‘:
register(user, pwd)
if __name__ == ‘__main__‘:
main()
2.student.py
import sys
import os
import pickle
sys.path.append(os.path.dirname(os.path.dirname(__file__)))
from lib import models
from config import settings
from lib.models import Teacher
from lib.models import Admin
from lib.models import Course
def course_info(student_obj):
for item in student_obj.course_list:
print(item.course_name, item.teacher.name)
def select_course(student_obj):
course_list = pickle.load(open(settings.COURSE_DB_DIR, ‘rb‘))
for num, item in enumerate(course_list, 1):
print(num, item.course_name, item.cost, item.teacher.name)
while True:
num = input(‘请选择课程:(q退出)‘)
if num == ‘q‘:
break
select_course_obj = course_list[int(num) - 1]
if select_course_obj in student_obj.course_list:
‘‘‘
相同则跳过
‘‘‘
pass
student_obj.course_list.append(select_course_obj)
pickle.dump(student_obj, open(os.path.join(settings.BASE_STUDENTS_DIR, student_obj.username), ‘wb‘))
def login(user, pwd):
if os.path.exists(os.path.join(settings.BASE_STUDENTS_DIR, user)):
student_obj = pickle.load(open(os.path.join(settings.BASE_STUDENTS_DIR, user), ‘rb‘))
if student_obj.login(user, pwd):
while True:
inp = input(‘1选课 2上课 3查看课程信息\n>>>‘)
if inp == ‘1‘:
select_course(student_obj)
elif inp == ‘3‘:
course_info(student_obj)
else:
break
else:
print(‘密码错误‘)
else:
print(‘用户不存在‘)
def register(user, pwd):
obj = models.Student()
obj.register(user, pwd)
def main():
inp = input(‘1.登录；2.注册\n >>>‘)
user = input(‘用户名：‘)
pwd = input(‘密码：‘)
if inp == ‘1‘:
login(user, pwd)
elif inp == ‘2‘:
register(user, pwd)
if __name__ == ‘__main__‘:
main()
3.settings.py
# 配置文件 开放封闭原则，不改动源码，更改配置文件 import os BASE_DIR = os.path.dirname(os.path.dirname(__file__)) BASE_ADMIN_DIR = os.path.join(BASE_DIR, ‘db‘, ‘admin‘) BASE_STUDENTS_DIR = os.path.join(BASE_DIR, ‘db‘, ‘students‘) TEACHER_DB_DIR = os.path.join(BASE_DIR, ‘db‘, ‘teacher_list‘) COURSE_DB_DIR = os.path.join(BASE_DIR, ‘db‘, ‘course_list‘) log_path = ‘/home/alex/‘ #日志路径
4.models.py
import random
import os
import time
import pickle
from config import settings
class Teacher:
‘‘‘
封装老师的相关信息
‘‘‘
def __init__(self, name, age, admin):
self.name = name # 老师的姓名
self.age = age # 老师的年龄
self.__assets = 0 # 老师的资产
self.create_time = time.strftime(‘%Y-%m-%d %H:%M:%S‘) # 创建时间
self.create_admin = admin # 创建用户的管理员
def gain(self, cost):
‘‘‘
挣钱
:param cost:
:return:
‘‘‘
pass
def decrease(self, cost):
‘‘‘
花钱
:param cost:
:return:
‘‘‘
pass
class Admin:
def __init__(self):
self.username = None
self.password = None
def login(self, user, pwd):
‘‘‘
管理员登录
:param user:
:param pwd:
:return:
‘‘‘
if self.username == user and self.password == pwd:
return True
else:
return False
def register(self, user, pwd):
‘‘‘
管理员注册
:param user:
:param pwd:
:return:
‘‘‘
self.username = user
self.password = pwd
path = os.path.join(settings.BASE_ADMIN_DIR, self.username)
pickle.dump(self, open(path, ‘xb‘))
‘‘‘
将对象序列化到文件中，方便以后掏出来
xb即写读，文件如果存在，则报错
‘‘‘
class Course:
‘‘‘
课程相关信息
‘‘‘
def __init__(self, course_name, cost, teacher_obj, admin):
self.course_name = course_name
self.cost = cost
self.teacher = teacher_obj
self.create_time = time.strftime(‘%Y-%m-%d %H:%M:%S‘)
self.create_admin = admin
class Student:
‘‘‘
学生相关信息
‘‘‘
def __init__(self):
self.username = None
self.password = None
self.course_list = []
self.studey_dict = {}
def login(self, user, pwd):
if self.username == user and self.password == pwd:
return True
else:
return False
def register(self, user, pwd):
self.username = user
self.password = pwd
path = os.path.join(settings.BASE_STUDENTS_DIR, self.username)
pickle.dump(self, open(path, ‘xb‘))
3.python小项目：学生选课系统
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