pub unsafe extern "C" fn PyUnicode_CopyCharacters(
to: *mut PyObject,
to_start: Py_ssize_t,
from: *mut PyObject,
from_start: Py_ssize_t,
how_many: Py_ssize_t,
) -> Py_ssize_t
pub unsafe extern "C" fn PyUnicode_CopyCharacters(
to: *mut PyObject,
to_start: Py_ssize_t,
from: *mut PyObject,
from_start: Py_ssize_t,
how_many: Py_ssize_t,
) -> Py_ssize_t