Converting 2bit hex representation to integer ?

[Madhusudan Singh]

Larry Bates wrote:

> Can you give us an example.  I don't know what two bit
> hex means (takes at least 4 bits to make a hex digit).

Like 64(base 16)=100.
I am referring to 64 in the above.

> 
> Now I'm going to try to guess:
> 
> If the data is binary then all you need to do is to
> use the struct.unpack module to convert to integer.

Doesn't unpack presume that the input is a string ? If so, is it safe to
convert binary data to string using str() ?