Need help converting code to 2.5

[berkinet]

The following (from a Phidgets device driver) is written in Python 2.6 and does not work in 2.5:

Code: Select all

        hexArray = c_char*16
        self.__hexLookup = hexArray(b'0', b'1', b'2', b'3', b'4', b'5', b'6', b'7', b'8', b'9', b'A', b'B', b'C', b'D', b'E', b'F')

results in:

Code: Select all

    self.__hexLookup = hexArray(b'0', b'1', b'2', b'3', b'4', b'5', b'6', b'7', b'8', b'9', b'A', b'B', b'C', b'D', b'E', b'F')
                                   ^
SyntaxError: invalid syntax

Here is where it is actually used:

Code: Select all

        str = ""
        for i in range(5):
            str += (self.__hexLookup[int(tagValue[i] / 16)]).decode()
            str += (self.__hexLookup[int(tagValue[i] % 16)]).decode()

If I print out the individual values in tagValue (tagValue) I see a set of strings representing ints. Like: 1, 6, 142, 7, 129
But, if I try to print tagValue
itself I get: ctypes.LP_c_ubyte object at 0x4935d0

I am guessing the output is supposed to be a hex string. Unfortunately, the original author is no longer at Phidgets, and no one there is sure what the out pit should look like.

Any help replacing this with 2.5 compatible code would be greatly appreciated.

[berkinet]

I answered my own question. For those who were interested, this:

• tag += str("%02x" % tagValue).upper()

accomplishes the same thing as:

• str += (self.__hexLookup[int(tagValue / 16)]).decode()
  str += (self.__hexLookup[int(tagValue % 16)]).decode()

and I just dropped the array declaration altogether.

[jay (support)]

I think you can just remove the "b" on each argument. According to the Python docs on string literals:

A prefix of 'b' or 'B' is ignored in Python 2

Clearly it's not ignored in Python 2.5 since it thinks it's a syntax error.

[berkinet]

I think you can just remove the "b" on each argument.

Thanks Jay, you and I were posting at the same time. BTW, Your suggestion also worked.