hex array to array of 16 bit numbers?

[Todd Gardner]

Hello everyone,

I would really appreciate some of your expertise or even just
pointers. How do I convert this hex array variable "buffer" to array
of 16 bit numbers?

repr(buffer.raw)= '\xcd\x00\xce\x00\xce\x00\xce\x00'
Any ideas would be greatly appreciated!

Todd

 

[Bjorn Pettersen]

[posted and mailed]

(e-mail address removed) (Todd Gardner) wrote in

Hello everyone,

I would really appreciate some of your expertise or even just
pointers. How do I convert this hex array variable "buffer" to array
of 16 bit numbers?


repr(buffer.raw)= '\xcd\x00\xce\x00\xce\x00\xce\x00'

Any ideas would be greatly appreciated!

Todd

First I think your missing the fact that the 'hex' values you're seing is
simply an encoding of the byte value at that byte-index in the buffer, ie.
your buffer starts with bytes containing the following values:

[205] [0] [206] ...

besides that, you're looking for the struct module

-- bjorn

 

[Todd Gardner]

That's all I needed to make it work.

Thank you for pointing me to the correct module.

Todd

 

[Robin Munn]

Hello everyone,

I would really appreciate some of your expertise or even just
pointers. How do I convert this hex array variable "buffer" to array
of 16 bit numbers?


repr(buffer.raw)= '\xcd\x00\xce\x00\xce\x00\xce\x00'

Any ideas would be greatly appreciated!

I think the struct.unpack() method is what you're looking for here:

http://www.python.org/doc/current/lib/module-struct.html

If you've got four 16-bit numbers, then:

import struct
status_tuple = struct.unpack('4h', buffer.raw)

should give you what you want. Read the documentation for the meaning of
the various format characters.

 

[Francis Avila]

Todd Gardner wrote in message

That's all I needed to make it work.

Thank you for pointing me to the correct module.

Todd

Just as a heads up, your code uses the name "buffer", which clobbers the
builtin function "buffer." (Which, honestly, I've never seen used, but
still....)