On Wed, Nov 11, 2015 at 9:27 AM, kent nyberg <k...@z-sverige.nu> wrote: > Im reading about bitwise operators and is it true to say they dont work 100% > as in C? > bitwise operators in C seem to result in bits going to the so called > bitbucket. > For example, 0b00000001. Shifting it >> 1 in C it seems to add on zero to > the left and the 1 to the right gets throwned away. > > But doing it in python just adds one more bit, from the left. > That is, 0b00000001 >> 1 = 0b000000001.
I'm not sure what you're expecting Python to do here, but right-shifting the integer 1 results in the integer 0: >>> 0b000001 >> 1 0 > Bitwise operators in C (when reading examples,) gives some time code that > check specific bits by > shifting the bits left and right to make every bit but the specific one to > zeros. > As I understand bitwise operators in python, this is not possible then? If you want to check specific bits (in C or Python, either way), it's much more common to use bitwise AND than bit shifts: >>> 0b100011011101010110 & 0b000000010000 16 >>> print(bin(_)) 0b10000 This will be either the same number as the right hand side (if the bit had been set) or zero (if it hadn't). ChrisA -- https://mail.python.org/mailman/listinfo/python-list
