How to send String as hexadecimal in python socket?

Question

If I want to use Python to send hexadecimal data to the Java code on the server for parsing, is this the only option:

b'0x230x230x350x380x390x31'?

How to send it in a simple form like B '0x232335383931'? Because I need to change the numbers frequently, I have tried it by myself, but I can't. Is there any other solution?

BrownieInMotion · Accepted Answer · 2021-11-05 22:13:35Z

1

It looks like this is a problem not in Python but with the server you are sending it to: that server is the thing doing the parsing. Here's one way to deal with it:

def prepare(string):
    return b''.join(
        b'0x' + string[i:i + 2]
        for i in range(0, len(string), 2)
    )


print(prepare(b'232335383931'))

Output:

b'0x230x230x350x380x390x31'

You can easily edit b'232335383931', then prepare it before sending it to your Java server.

answered Nov 5, 2021 at 22:13

BrownieInMotion

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3 Comments

gassy Over a year ago

Thanks your answer,but if my string is a variable , just like my_str = '232335383931' prepare(b''.join(my_str)) # tips expect byte , string found

BrownieInMotion Over a year ago

@gassy either do my_str = b'232335383931' OR prepare(my_str.encode()) (don't do both!)

gassy Over a year ago

hi, but how to get b'\x23\x23\x35\x38\x39\x31' , I used b'\x' + string[i:i + 2] , it error, and use b'\\x' + string[i:i + 2] , the result is b'\\x23\\x23\\x35\\x38\\x39\\x31' ,

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