AttributeError: ‘file’ object has no attribute ‘buffer’ error occurs when you are trying to access the buffer attribute on a file object, but this attribute might not be available.
The main reason for the error is that the buffer attribute is available for file objects in Python 3 but not in Python 2. If you are running Python 2, you will get this error.
How to fix the error
To fix the error, Always ensure you are using the right version of Python for your code. If you use an older version like 2.x, upgrade it to Python 3.x.
Ensure that the file is opened in binary mode (‘b’), e.g., ‘rb’ for reading in binary or ‘wb’ for writing in binary. The buffer attribute is only available when a file is opened in binary mode.
with open('filename.txt', 'rb') as f: data = f.buffer.read()
If, for some reason, you can’t use the buffer attribute, there are other ways to read/write binary data from/to a file. For instance, when opened in binary mode, you can simply use the read() and write() methods on the file object.
I hope this solution fixes the error.