学生管理系统
输入用户名和密码,现在users.json文件查找用户名密码是否正确,正确登录,不正确就返回错误信息,并且继续输入用户密码
登录成功后,根据相应的用户名找到对应的json文件,取出里面数据保存转换为python数据,保存在程序中,按照提示进行选择
如果想要删除或者修改,先进入查询系统,选择查询方式,找到相应的学生之后才能删除或者修改
import json
def find_all(student_list):
"""
查询所有学生的成绩
:param student_list: 学生列表
:return:
"""
print("以下是全部学生成绩:")
for x in range(len(student_list)):
for key in student_list[x]:
print('{}:{}'.format(key, student_list[x][key]), end=" ") # key + ":" + student_list[x][key]
else:
print("\n")
flag1 = '1'
while not flag1.isdigit() or eval(flag1):
flag1 = input("输入数字0返回上一级")
def update(student_list, x):
"""
修改学生信息
:param x: 索引值
:param student_list: 学生列表
:return:
"""
student = student_list[x]
print("--------------------------------------------------")
print("欢迎进入学生信息修改系统")
print("需要修改的学生信息为:{}".format(student))
print("1.Name 2.EScore 3.SScore 4.AScore 5.MScore 6.Age")
flag3 = input("请输入需要修改的项目(输入数字0返回上一级):")
while flag3 != '0':
if flag3 == '1':
print("原信息为:", student['Name'])
student['Name'] = input('请输入新的信息:')
elif flag3 == '2':
print("原信息为:", student['EScore'])
student['EScore'] = eval(input('请输入新的信息:'))
elif flag3 == '3':
print("原信息为:", student['SScore'])
student['SScore'] = eval(input('请输入新的信息:'))
elif flag3 == '4':
print("原信息为:", student['AScore'])
student['AScore'] = eval(input('请输入新的信息:'))
elif flag3 == '5':
print("原信息为:", student['MScore'])
student['MScore'] = eval(input('请输入新的信息:'))
elif flag3 == '6':
print("原信息为:", student['Age'])
student['Age'] = eval(input('请输入新的信息:'))
print("更新成功")
print("更新后的信息为:", student)
write_file(name, student_list)
flag3 = input("请输入需要修改的项目(输入数字0返回上一级):")
return student_list
def _detele(student_list, student):
print("您需要删除信息为:", student)
student_list.remove(student)
print("删除成功")
write_file(name, student_list)
return student_list
def find_by_name(student_list):
student_name = input("请输入姓名:")
number = 1
i = 1
new_student_list = []
while i:
for x in range(len(student_list)):
if student_list[x].get("Name") == student_name:
print(number, student_list[x])
new_student_list.append(x)
number += 1
i = 0
if i:
print("该学生不存在!")
student_name = input("请重新输入姓名:")
return new_student_list
def find_by_sno(student_list):
sno = input('请输入学号')
new_student_list = []
i = 1
while i:
for x in range(len(student_list)):
if student_list[x].get("Sno") == sno:
print('1', student_list[x])
new_student_list.append(x)
i = 0
if i:
print("该学生不存在!")
sno = input("请重新输入学号:")
return new_student_list
def find(student_list):
"""
学生查询并且修改删除
:param student_list:
:return:
"""
print("欢迎进入学生信息查询修改系统")
flag4 = '1'
while not flag4.isdigit() or eval(flag4):
choose_number = '0'
while not choose_number.isdigit() or not 0 < int(choose_number) <= 2:
choose_number = input('1.输入姓名查找\n'
'2.输入学号查找\n'
'请输入数字:')
if eval(choose_number) == 1:
new_student_list = find_by_name(student_list)
choose = eval(input('请输入要操作的学生的序号'))
elif eval(choose_number) == 2:
new_student_list = find_by_sno(student_list)
choose = 1
while choose <= 0 or choose > len(new_student_list):
choose = eval(input('请输入要操作的学生的序号'))
x = new_student_list[choose - 1]
flag2 = '1'
while flag2:
flag2 = eval(input("1.修改该学生信息请输入数字1\n"
"2.删除该学生信息请输入数字2\n"
"输入数字0返回上一级\n"
"请输入数字:"))
if int(flag2) == 1:
student_list = update(student_list, x)
elif int(flag2) == 2:
student_list = _detele(student_list, student_list[x])
break
flag4 = input('输入数字0返回上一级,输入数字1查询其他')
return student_list
def get_number(student):
number = student['Sno'][-1:-4:-1]
number = number[::-1]
while number.startswith('0'):
number = number[1:]
return number
def list_sort(student_list):
if len(student_list) == 0:
return "1"
for x in range(len(student_list) - 1):
for y in range(len(student_list) - x - 1):
if get_number(student_list[y]) > get_number(student_list[y + 1]):
student_list[y], student_list[y + 1] = student_list[y + 1], student_list[y]
return get_number(student_list[-1])
def gen_new_sno(class_name, last_number):
while True:
new_sno = class_name + str(last_number + 1).rjust(3, '0')
yield new_sno
def add(student_list, last_number):
"""
添加学生信息
:param last_number:
:param student_list: 学生列表
:return:
"""
print("进入学生信息添加系统")
student = {}
student.setdefault("Name", input("请输入学生姓名:"))
class_name = input("请输入学生类型")
new_sno = gen_new_sno(class_name, last_number)
student.setdefault("Sno", next(new_sno))
student.setdefault("EScore", eval(input("请输入学生英语成绩:")))
student.setdefault("SScore", eval(input("请输入学生体育成绩:")))
student.setdefault("AScore", eval(input("请输入学生艺术成绩:")))
student.setdefault("MScore", eval(input("请输入学生数学成绩:")))
student.setdefault("Age", eval(input("请输入学生年龄:")))
student_list.append(student)
print("添加完成")
write_file(name, student_list)
return student_list
def read_file(f_name):
file_name = './' + f_name + '.json'
with open(file_name, 'r', encoding='utf-8') as f:
new_list = json.load(f)
return new_list
def write_file(f_name, student_list):
file_name = './' + f_name + '.json'
with open(file_name, 'w', encoding='utf-8') as f:
json.dump(student_list, f, ensure_ascii=False, indent=4)
def verification(uer_name, u_keywords):
users = read_file('users')
for x in range(len(users)):
if users[x]['Name'] == uer_name:
if users[x]['keywords'] == u_keywords:
loading_message = "登录成功"
return False, loading_message
else:
loading_message = '密码错误'
return True, loading_message
else:
loading_message = '用户名错误'
return True, loading_message
def register():
new_users = {}
register_name = input('输入您的用户名:')
register_keywords = input('输入您的密码:')
users_list = read_file('users')
for x in range(len(users_list)):
if users_list[x]["Name"] == register_name:
print("用户名已经存在,请重新输入")
register()
break
else:
new_users['Name'] = register_name
new_users['keywords'] = register_keywords
users_list.append(new_users)
write_file('users', users_list)
register_student_list = []
new_file_name = './' + register_name + '.json'
write_file(new_file_name, register_student_list)
print('注册成功')
def longing():
longing_name = input('输入您的用户名:')
keywords = input('输入您的密码:')
value, message = verification(longing_name, keywords)
while value:
print(message)
longing_name = input('输入您的用户名:')
keywords = input('输入您的密码:')
value, message = verification(longing_name, keywords)
print(longing_name)
return longing_name
def longing_or_register():
print("************************************************")
print("* 请选择操作 *")
print("* 1.登录 *")
print("* 2.注册 *")
print("************************************************")
i = input("请输入数字:")
if i == '1':
return longing()
elif i == '2':
register()
longing_or_register()
if __name__ == '__main__':
name = longing_or_register()
StudentList = read_file(name)
last_number = int(list_sort(StudentList))
flag = '1'
while (not flag.isdigit()) or (eval(flag)):
print("************************************************")
print("* 欢迎{}进入学生管理系统 *".format(name))
flag = input("* 1.输入数字1查询班级所有学生 *\n"
"* 2.输入数字2根据姓名查找或者修改学生 *\n"
"* 3.输入数字3添加学生 *\n"
"* 4.输入数字0退出系统 *\n"
"************************************************\n"
"请输入数字:"
)
if flag.isdigit():
if int(flag) == 1:
find_all(StudentList)
elif int(flag) == 2:
find(StudentList)
elif int(flag) == 3:
StudentList = add(StudentList, last_number)
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