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Forums › IT Pro and developers › Python Guru (2.7) needed convert a string to it's hex values


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Uber Geek
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Topic # 236434 1-Jun-2018 21:07
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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'




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D.W

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Ultimate Geek
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  Reply # 2027270 1-Jun-2018 21:37
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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.



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  Reply # 2027291 1-Jun-2018 22:09
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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.




Previously known as psycik

OpenHAB: Gigabyte AMD A8 Brix, OpenHAB with Aeotech ZWave Controller, Raspberry PI, Wemos D1 Mini, Zwave, Xiaomi Humidity and Temperature sensors and Bluetooth LE Sensors
Media:Chromecast v2, ATV4, Roku3, HDHomeRun Dual
Windows 10 Host (Plex Server/Crashplan): 2x2TB, 2x3TB, 1x4TB using DriveBender, Samsung 850 evo 512 GB SSD, Hyper-V Server with 1xW10, 1xW2k8, 2xUbuntu 16.04 LTS, Crashplan, NextPVR channel for Plex,NextPVR Metadata Agent and Scanner for Plex

 
 
 
 




4292 posts

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  Reply # 2027295 1-Jun-2018 22:34
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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.




Previously known as psycik

OpenHAB: Gigabyte AMD A8 Brix, OpenHAB with Aeotech ZWave Controller, Raspberry PI, Wemos D1 Mini, Zwave, Xiaomi Humidity and Temperature sensors and Bluetooth LE Sensors
Media:Chromecast v2, ATV4, Roku3, HDHomeRun Dual
Windows 10 Host (Plex Server/Crashplan): 2x2TB, 2x3TB, 1x4TB using DriveBender, Samsung 850 evo 512 GB SSD, Hyper-V Server with 1xW10, 1xW2k8, 2xUbuntu 16.04 LTS, Crashplan, NextPVR channel for Plex,NextPVR Metadata Agent and Scanner for Plex

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