1.使用os和os.path以及函数的递归完成:
给出一个路径，遍历当前路径所有的文件及文件夹
打印输出所有的文件（遇到文件输出路径，遇到文件夹继续进文件夹）
python
import os
def traversal_file (path):
if not os.path.exists(path):
print(f"{path}路径不存在")
return
if not os.path.isdir(path):
print(f"{path}不是有效的文件夹路径")
return
try:
for file_name in os.listdir(path):
full_path = os.path.join(path,file_name)
if os.path.isfile(full_path):
print(f"{full_path}文件")
elif os.path.isdir(full_path):
traversal_file(full_path)
except PermissionError:
print(f"无法访问该路径{path}")
if __name__ == "__main__" :
target_path = input("请输入要遍历的路径:").strip()
traversal_file(target_path)
2.使用加密模块及IO模拟登录功能，要求使用文件模拟数据库存储用户名和密码。
python
import hashlib
MARIADB_FILE = "mariadb.txt"
def encryption_passwd(password):
salt = "python_secure_2026"
password_with_salt = (password + salt).encode("utf-8")
md5_obj = hashlib.md5(password_with_salt)
return md5_obj.hexdigest()
def register(username,password):
if user_exists(username):
print(f"用户{username}已存在")
return False
encryption_pwd =encryption_passwd(password)
try:
with open(MARIADB_FILE,"a",encoding="utf-8") as f :
f.write(f"{username}:{encryption_pwd}\n")
print(f"用户{username}注册成功")
return True
except Exception as e :
print(f"注册失败")
return False
def user_exists(username):
try:
with open(MARIADB_FILE,"r",encoding="utf-8") as f :
for line in f :
line = line.strip()
if not line:
continue
user, _ = line.split(":", 1)
if user == username:
return True
return False
except FileNotFoundError:
return False
def login(username,password):
encryption_input_pwd = encryption_passwd(password)
try:
with open(MARIADB_FILE,"r",encoding="utf-8") as f:
for line in f :
line = line.strip()
if not line:
continue
user, stored_pwd = line.split(":",1)
if user == username:
if stored_pwd == encryption_input_pwd:
print(f"用户{username}登陆成功")
return True
else:
print("登陆失败,密码错误")
return False
print(f"用户{username}不存在")
return False
except FileNotFoundError:
print("用户数据库文件不存在，请先注册")
if __name__ == "__main__":
while True:
print("\n1.注册新用户")
print("2.用户登录")
print("3.退出系统")
choice = input("请选择操作").strip()
if choice == "1":
username = input("请输入用户名:").strip()
password = input("请输入密码:").strip()
if not username or not password:
print ("不能为空")
continue
register(username,password)
elif choice == "2":
username = input("请输入用户名:").strip()
password = input("请输入密码:").strip()
if not username or not password:
print ("不能为空")
continue
login(username,password)
elif choice == "3":
print("退出系统")
break
else:
print("输入错误，请选择1,2,3")
3.使用面向对象编程完成学生信息录入功能，数据存储在本地文件txt中，并读取学生信息并按照成绩进行排序，学生其他属性自行规划
python
class Student:
DATA_FILE = "students.txt"
def __init__(self,stu_id,name,age,chinese,math,english):
self.stu_id = stu_id
self.name = name
self.age = age
self.chinese = chinese
self.math = math
self.english = english
@property
def total_score(self):
return self.chinese + self.math + self.english
def to_string(self):
return f"{self.stu_id},{self.name},{self.age},{self.chinese},{self.math},{self.english}"
@staticmethod
def from_string(line):
parts = line.strip().split(",")
stu_id = parts[0]
name = parts[1]
age = int(parts[2])
chinese = float(parts[3])
math = float(parts[4])
english = float(parts[5])
return Student(stu_id,name,age,chinese,math,english)
def __str__(self):
return (f"学号：{self.stu_id} | 姓名：{self.name} | 年龄：{self.age} "
f"| 语文：{self.chinese} | 数学：{self.math} | 英语：{self.english} "
f"| 总分：{self.total_score}")
def add_student():
while True:
stu_id = input("请输入学号（如2026001，唯一）：").strip()
if not stu_id:
print("学号不能为空！")
continue
if check_stu_id_exists(stu_id):
print(f"学号 {stu_id} 已存在")
continue
break
name = input("请输入姓名：").strip()
while True:
try:
age = int(input("请输入年龄：").strip())
if age <= 0 or age > 100:
print("年龄需在1-100之间")
continue
break
except ValueError:
print("年龄必须是数字")
def input_score(subject):
while True:
try:
score = float(input(f"请输入{subject}成绩（0-100）：").strip())
if score < 0 or score > 100:
print(f"{subject}成绩需在0-100之间")
continue
return score
except ValueError:
print(f"{subject}成绩必须是数字")
chinese = input_score("语文")
math = input_score("数学")
english = input_score("英语")
student = Student(stu_id, name, age, chinese, math, english)
try:
with open(Student.DATA_FILE, "a", encoding="utf-8") as f:
f.write(student.to_string() + "\n")
print(f"学生 {name} 信息录入成功！")
except Exception as e:
print(f"录入失败：{e}")
def check_stu_id_exists(stu_id):
try:
with open(Student.DATA_FILE, "r", encoding="utf-8") as f:
for line in f:
line = line.strip()
if not line:
continue
s_id = line.split(",")[0]
if s_id == stu_id:
return True
return False
except FileNotFoundError:
return False
except Exception as e:
print(f"校验学号出错：{e}")
return False
def read_and_sort_students():
students = []
try:
with open(Student.DATA_FILE, "r", encoding="utf-8") as f:
for line in f:
line = line.strip()
if not line:
continue
student = Student.from_string(line)
students.append(student)
if not students:
print("暂无学生信息，请先录入！")
return
students_sorted = sorted(students, key=lambda s: s.total_score, reverse=True)
for idx, s in enumerate(students_sorted, 1):
print(f"第{idx}名：{s}")
except FileNotFoundError:
print("学生信息文件不存在，请先录入！")
except Exception as e:
print(f"读取/排序失败：{e}")
if __name__ == "__main__":
while True:
print("\n1. 录入学生信息")
print("2. 查看并排序学生信息")
print("3. 退出系统")
choice = input("请选择操作（1/2/3）：").strip()
if choice == "1":
add_student()
elif choice == "2":
read_and_sort_students()
elif choice == "3":
print("退出系统")
break
else:
print("输入错误，请选择1/2/3！")