如何在此函数中将数据从字节更改为字符串？

Question

I have some code for networking program. and its

def dataReceived(self, data)
    print(f"Received quote: {data}") 
    self.transport.loseConnection()

This function is printing

Received quote: b'\x00&C:\\Users\\.pycharm2016.3\\config\x00&C:\\users\\pych‌​arm\\system\x00\x03-‌​-'

How would i change my code to fix this?

I think I know that what is happening is what is being printed out is the code in bytes and it needs to be converted to a string, but do I do this on the server or client side of the program?

When i write

print(f"receivedquote: {data}".decode('utf-8')

that does not do the trick. I get a lot of errors. How can I ask this question better to find a solution?

Answer 1

Decode the actual data:

data = data.decode('utf-8')

At this point, data is a Python Unicode string which you can print, search, slice, etc.

(Your data doesn't particularly look like UTF-8 but I'm not going to second-guess that; it's not clearly not UTF-8, either.)

It's generally a good idea to convert to Unicode immediately after receiving a byte string, and have the rest of your program operate on strings. If you need to encode back to bytes, similarly do that only at the perimeter, jut before the data leaves your program. ( Ned Batchelder calls this "Unicode sandwiching.")