Python 8天从入门到精通训练营笔记4. 函数编程

1. 数据存到文件里的格式： 姓名、年龄、身份证、手机、学科

2. 确保手机、身份证唯一

3. 选学科时，给用户列出选项供选择

https://blog.csdn.net/m0_69606520/article/details/124373854

db_file ="student_data.db"

def validate_phone(num):

if not num.isdigit():

exit("phone umber must be digit")

if len(num)!=11:

exit("phone number length must be 11")

return True

def register_api():

stu_data = {}

print("welcome".center(50,"-"))

print("Please singn up!")

name =input("Name:").strip()

age =input("Age:").strip()

phone =input("Phone:").strip()

if phonein phone_list:

exit("this phone already registered,quit!")

validate_phone(phone)

id_num =input("ID:").strip()

if id_numin id_num_list:

exit("this id num already registered,quit!")

course_list = ["Phyton","Java","C++","Chinese","English"]

for index,coursein enumerate(course_list):

print(f"{index}.{course}")

selected_course =input("Choose the couse you prefer:")

if selected_course.isdigit():

selected_course =int(selected_course)

if selected_course >=0 and selected_course <=len(course_list):

picked_course = course_list[selected_course]

else:

exit("illegal input")

else:

exit("illegal input")

stu_data["name"] = name

stu_data["age"] = age

stu_data["phone"] = phone

stu_data["id_num"] = id_num

stu_data["course"] = picked_course

return stu_data

def commit_to_db(filename,stu_data):

"""

    :param filename:学员数据库文件

    :param stu_data: 单个学员数据的dict

    :return:

"""

    f =open(filename,"a")

row =f"{stu_data['name']},{stu_data['age']},{stu_data['phone']},{stu_data['id_num']},{stu_data['course']}"

    f.write(row)

f.close()

def load_validated_data(filename):

f =open(filename)

phone_list = []

id_num_list = []

for linein f:

line = line.split(",")

phone = line[2]

id_num = line[3]

phone_list.append(phone)

id_num_list.append(id_num)

return phone_list,id_num_list

phone_list,id_num_list = load_validated_data(db_file)

student_data = register_api()

print(student_data)

commit_to_db(db_file,student_data)