>
>> Hello,
>>
>> I have an array that takes on the following form:
>>
>> x = [1000,1001,1011,1111]
>
> But these are actually integers in decimal representation. You could treat
> them as binary, but I recommend that you use integers in binary
> representation to avoid confusion:
>
>>>> x = [0b1000, 0b1001, 0b1011, 0b1111]
>>>> x
> [8, 9, 11, 15]
>
>> The array elements are meant to be binary representation of integers.
>>
>> Goal: Access array elements and extract the first two bits.
>
> Is the number of bits fixed to four? If so you can shift the bits to the
> right:
>
>>>> y = [v>>2 for v in x]
Right shifting is well defined in Python?
>>>> y
> [2, 2, 2, 3]
>>>> y
> [2, 2, 2, 3]
>
> All that is left to do now is to convert the result to binary for display
> purposes:
>
>>>> for v in y: print "{:02b}".format(v)
> ...
> 10
> 10
> 10
> 11
>
>> e.g. Final result would look something like this:
>>
>> x_new = [10,10,10,11]
>>
>> What I have tried:
>>
>> data_indices = range(4) # Set up array of values to loop over
>>
>> for idx in data_indices:
>> f = x[idx] # Index into array of x values
>> f_idx = f[:2] # Extract first two elements
>
> This works for strings and sequences, but not for numbers.
>
>> print f_idx
>>
>> I then receive the following error:
>>
>> IndexError: invalid index to scalar variable.
>
>
>
>
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>
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