3. File operation 3-with

1、with： Benefits: no need to close files manually （f.close()）

The following is a simple operation of reading files

with open(' New files .txt',mode='r' ,encoding='utf-8') as f:
    for i in f:
        print(i.strip())

2、 The following validation with No use close()

3、 Pattern mode='rb', Yes Read non text , Namely , Audio , video , Picture these , These are not stored in strings , It is stored in bytes ;mode='wb', Write audio , video , Picture these data （ They are stored in bytes ）

The following example is , Will a mp4 The operation of assigning a copy to a file