You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: lib.rs
    path of file: ./repos/LibAFL/bindings/pylibafl/src
    
    the code of the file until where you have to start completion: use pyo3::{prelude::*, types::PyDict};

const LIBAFL_CODE: &str = r#"
class BaseObserver:
    def flush(self):
        pass
    def pre_exec(self, state, input):
        pass
    def post_exec(self, state, input, exit_kind):
        pass
    def pre_exec_child(self, state, input):
        pass
    def post_exec_child(self, state, input, exit_kind):
        pass
    def name(self):
        return type(self).__name__
    def as_observer(self):
        return Observer.new_py(self)

class BaseFeedback:
    def init_state(self, state):
        pass
    def is_interesting(self, state, mgr, input, observers, exit_kind) -> bool:
        return False
    def append_metadata(self, state, observers, testcase):
        pass
    def discard_metadata(self, state, input):
        pass
    def name(self):
        return type(self).__name__
    def as_feedback(self):
        return Feedback.new_py(self)

class BaseExecutor:
    def observers(self) -> ObserversTuple:
        raise NotImplementedError('Implement this yourself')
    def run_target(self, fuzzer, state, mgr, input) -> ExitKi
    
pub fn python_module(py: Python, m: &PyModule) -> PyResult<()> {
    pyo3_log::init();

    let modules = py.import("sys")?.getattr("modules")?;

    let sugar_module = PyModule::new(py, "sugar")?;
    libafl_sugar::python_module(py, sugar_module)?;
    m.add_submodule(sugar_module)?;
    modules.set_item("pylibafl.sugar", sugar_module)?;

    #[cfg(target_os = "linux")]
    {
        let qemu_module = PyModule::new(py, "qemu")?;
        libafl_qemu::python_module(py, qemu_module)?;
        m.add_submodule(qemu_module)?;
        modules.set_item("pylibafl.qemu", qemu_module)?;
    }

    let bolts_module = PyModule::new(py, "libafl_bolts")?;
    libafl_bolts::pybind::python_module(py, bolts_module)?;
    m.add_submodule(bolts_module)?;
    modules.set_item("pylibafl.libafl_bolts", bolts_module)?;

    let libafl_module = PyModule::new(py, "libafl")?;
    libafl::pybind::python_module(py, libafl_module)?;

    libafl_module.add("__builtins__", py.import("builtins")?)?;

    let locals = PyDict::new(py);
    py.run(LIBAFL_CODE, Some(libafl_module.dict()), Some(locals))?;
    for (key, val) in locals.iter() {
        libafl_module.add(key.extract::<&str>()?, val)?;
    }

    m.add_submodule(libafl_module)?;
    modules.set_item("pylibafl.libafl", libafl_module)?;

    Ok(())
}