Constant Py_TPFLAGS_BASE_EXC_SUBCLASS
pub const Py_TPFLAGS_BASE_EXC_SUBCLASS: u64 = _; // 1_073_741_824u64Available on crate features
dep_pyo3 and std only.pub const Py_TPFLAGS_BASE_EXC_SUBCLASS: u64 = _; // 1_073_741_824u64dep_pyo3 and std only.