Python Guru (2.7) needed convert a string to it's hex values

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davidcole

6029 posts

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#236434 1-Jun-2018 21:07

So I have a string (in a config file), 1234.

I need to post that as two different hex values. x12 and x34.

I honestly can't get how. If I convert the string to hex, I get x0c and x22 - which is not what I want. Now I could store as a string 18,52, but I want the number in the clear.

these two hex values will be going into an existing array, of which I'm currently hacking in in there by:

message += b'\x12'
message += b'\x34'

Previously known as psycik

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D.W

725 posts

Ultimate Geek

#2027270 1-Jun-2018 21:37

I might not be following what you're asking here, but using int(string, 16) will give you the value in hex.

e.g.

myVal = '12'

myNum = int(myVal, 16) will give you 18, which you can then convert back to hex as required.

davidcole

6029 posts

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#2027291 1-Jun-2018 22:09

D.W:

I might not be following what you're asking here, but using int(string, 16) will give you the value in hex.

e.g.

myVal = '12'

myNum = int(myVal, 16) will give you 18, which you can then convert back to hex as required.

Hmm doesn't seem to do what I want, but the value is correct:

myVal = '12'
myNum = int(myVal, 16)
message += hex(myNum)

When looking at the value

message = "\x00\x00\x00\x00\x16\x06\x10\x02')0x12"

so the 0x12 has just been added, but not sure how to add it as \x12

the whole message should end

"\x00\x00\x00\x00\x16\x06\x10\x02\x12\x34"

So half there.

davidcole

6029 posts

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#2027295 1-Jun-2018 22:34

I got it....had another google search and got the following:

where pcpassword is '1234'

hex_data = pcpassword.decode("hex")
message += hex_data

It gives me the data that I want - which incidentally logs on to my paradox alarm.

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