Constant PY_SSIZE_T_MAX
pub const PY_SSIZE_T_MAX: isize = Py_ssize_t::MAX; // 9_223_372_036_854_775_807isizeAvailable on crate feature
tls only.pub const PY_SSIZE_T_MAX: isize = Py_ssize_t::MAX; // 9_223_372_036_854_775_807isizetls only.