Python Day12 作业

# 1、通用文件copy工具实现
import os
import time

# f_path = input('输入要copy的文件目录')
# c_fpath = input('输入要copy到的目录')
# if os.path.exists(f_path):
#     with open(f_path, mode='rb')as f, open(c_fpath, mode='wb')as f1:
#         res = f.read()
#         f1.write(res)
# else:
#     print('路径不存在')
# 2、基于seek控制指针移动，测试r+、w+、a+模式下的读写内容
# with open('a.txt', mode='wb+', )as f:
#     f.write('aaa与你'.encode('utf-8'))
#     f.seek(6)
#     res = f.read().decode('utf-8')
#     print(res)
# with open('a.txt', mode='ab+', )as f:
#     f.write('ddddidid'.encode('utf-8'))
#     f.seek(6)
#     res = f.read().decode('utf-8')
#     print(res)
# 3、tail -f access.log程序实现
# with open('b.txt',mode='rb')as f:
#     f.seek(0, 2)
#     while True:
#         log = f.readline()
#         if len(log)==0:
#             time.sleep(0.5)
#         else:
#             print(log.decode('utf-8'),end='')