python初步的文件拷贝

with open(r'05copyimg.jpg', 'rb') as file:  
    s = file.read()  
    print(s)

with open(r'05copyimg2.jpg', 'ab') as w:  
    w.write(s)

with open(r'05copyimg.jpg', 'rb') as f:  
    with open(r'05copyimg3.jpg', 'ab') as w:  
        w.write(f.read())

如果不是二进制文件直接把 'rb', 'ab'改成‘r’，‘b’

～～～～～～外赠送read的一些方法，不要也得要～～～～～～
在b.txt文件中有那么一些文案

他们是这样的

with open('b.txt', 'r') as f:  
    print(f.readline()) \# 表示只读一行(我要学习py)
    print(f.readlines())    \#['学习喝红牛\n', '学习vue\n', '还要看公司的代码']


\~~~~~~~~~~~分割线～～～～～～～
  
with open('b.txt', 'r') as read:  
    with open('b\_copy02.txt', 'w') as write:  
        for index,line in enumerate(read.readlines()):  
            \# while (index < 2):  (加上这一行会打印很多出来，暂未找到原因)
             write.write(line)