New submission from Serhiy Storchaka: Currently the value of right operand of the right shift operator is limited by C Py_ssize_t type.
>>> 1 >> 10**100 Traceback (most recent call last): File "<stdin>", line 1, in <module> OverflowError: Python int too large to convert to C ssize_t >>> (-1) >> 10**100 Traceback (most recent call last): File "<stdin>", line 1, in <module> OverflowError: Python int too large to convert to C ssize_t >>> 1 >> -10**100 Traceback (most recent call last): File "<stdin>", line 1, in <module> OverflowError: Python int too large to convert to C ssize_t >>> (-1) >> -10**100 Traceback (most recent call last): File "<stdin>", line 1, in <module> OverflowError: Python int too large to convert to C ssize_t But this is artificial limitation. Right shift can be extended to support arbitrary integers. `x >> very_large_value` should be 0 for non-negative x and -1 for negative x. `x >> negative_value` should raise ValueError. >>> 1 >> 10 0 >>> (-1) >> 10 -1 >>> 1 >> -10 Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: negative shift count >>> (-1) >> -10 Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: negative shift count ---------- components: Interpreter Core messages: 289650 nosy: Oren Milman, mark.dickinson, serhiy.storchaka priority: normal severity: normal stage: needs patch status: open title: Get rid of C limitation for shift count in right shift type: enhancement versions: Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29816> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
