diff --git a/candle-examples/Cargo.toml b/candle-examples/Cargo.toml
index 0c1219d760..df85302d6d 100644
--- a/candle-examples/Cargo.toml
+++ b/candle-examples/Cargo.toml
@@ -27,7 +27,7 @@ intel-mkl-src = { workspace = true, optional = true }
 num-traits = { workspace = true }
 palette = { version = "0.7.6", optional = true }
 enterpolation = { version = "0.2.1", optional = true}
-pyo3 = { version = "0.22.0", features = ["auto-initialize"], optional = true }
+pyo3 = { version = "0.22.0", features = ["auto-initialize", "abi3-py311"], optional = true }
 rayon = { workspace = true }
 rubato = { version = "0.15.0", optional = true }
 safetensors = { workspace = true }
diff --git a/candle-examples/examples/reinforcement-learning/ddpg.rs b/candle-examples/examples/reinforcement-learning/ddpg.rs
index 5309eaf669..389caac1a1 100644
--- a/candle-examples/examples/reinforcement-learning/ddpg.rs
+++ b/candle-examples/examples/reinforcement-learning/ddpg.rs
@@ -1,5 +1,4 @@
 use std::collections::VecDeque;
-use std::fmt::Display;
 
 use candle::{DType, Device, Error, Module, Result, Tensor, Var};
 use candle_nn::{
@@ -167,6 +166,7 @@ fn track(
     Ok(())
 }
 
+#[allow(unused)]
 struct Actor<'a> {
     varmap: VarMap,
     vb: VarBuilder<'a>,
@@ -211,7 +211,7 @@ impl Actor<'_> {
         let target_network = make_network("target-actor")?;
 
         // this sets the two networks to be equal to each other using tau = 1.0
-        track(&mut varmap, &vb, "target-actor", "actor", &dims, 1.0);
+        track(&mut varmap, &vb, "target-actor", "actor", &dims, 1.0)?;
 
         Ok(Self {
             varmap,
@@ -244,6 +244,7 @@ impl Actor<'_> {
     }
 }
 
+#[allow(unused)]
 struct Critic<'a> {
     varmap: VarMap,
     vb: VarBuilder<'a>,
@@ -287,7 +288,7 @@ impl Critic<'_> {
         let target_network = make_network("target-critic")?;
 
         // this sets the two networks to be equal to each other using tau = 1.0
-        track(&mut varmap, &vb, "target-critic", "critic", &dims, 1.0);
+        track(&mut varmap, &vb, "target-critic", "critic", &dims, 1.0)?;
 
         Ok(Self {
             varmap,
@@ -322,6 +323,7 @@ impl Critic<'_> {
     }
 }
 
+#[allow(unused)]
 #[allow(clippy::upper_case_acronyms)]
 pub struct DDPG<'a> {
     actor: Actor<'a>,
diff --git a/candle-examples/examples/reinforcement-learning/gym_env.rs b/candle-examples/examples/reinforcement-learning/gym_env.rs
index a2b6652f87..05518b1bf1 100644
--- a/candle-examples/examples/reinforcement-learning/gym_env.rs
+++ b/candle-examples/examples/reinforcement-learning/gym_env.rs
@@ -1,4 +1,3 @@
-#![allow(unused)]
 //! Wrappers around the Python API of Gymnasium (the new version of OpenAI gym)
 use candle::{Device, Result, Tensor};
 use pyo3::prelude::*;
diff --git a/candle-examples/examples/reinforcement-learning/main.rs b/candle-examples/examples/reinforcement-learning/main.rs
index 1a25cd93ef..34115b228a 100644
--- a/candle-examples/examples/reinforcement-learning/main.rs
+++ b/candle-examples/examples/reinforcement-learning/main.rs
@@ -1,5 +1,3 @@
-#![allow(unused)]
-
 #[cfg(feature = "mkl")]
 extern crate intel_mkl_src;
 
diff --git a/candle-examples/examples/reinforcement-learning/policy_gradient.rs b/candle-examples/examples/reinforcement-learning/policy_gradient.rs
index 6c355fe62f..3ae2617d16 100644
--- a/candle-examples/examples/reinforcement-learning/policy_gradient.rs
+++ b/candle-examples/examples/reinforcement-learning/policy_gradient.rs
@@ -14,7 +14,7 @@ fn new_model(
 ) -> Result<(impl Module, VarMap)> {
     let input_size = input_shape.iter().product();
 
-    let mut varmap = VarMap::new();
+    let varmap = VarMap::new();
     let var_builder = VarBuilder::from_varmap(&varmap, dtype, device);
 
     let model = seq()
diff --git a/candle-examples/examples/reinforcement-learning/vec_gym_env.rs b/candle-examples/examples/reinforcement-learning/vec_gym_env.rs
index e382ad76da..a985d9e978 100644
--- a/candle-examples/examples/reinforcement-learning/vec_gym_env.rs
+++ b/candle-examples/examples/reinforcement-learning/vec_gym_env.rs
@@ -1,9 +1,8 @@
-#![allow(unused)]
 //! Vectorized version of the gym environment.
 use candle::{DType, Device, Result, Tensor};
 use pyo3::prelude::*;
-use pyo3::types::PyDict;
 
+#[allow(unused)]
 #[derive(Debug)]
 pub struct Step {
     pub obs: Tensor,
@@ -11,6 +10,7 @@ pub struct Step {
     pub is_done: Tensor,
 }
 
+#[allow(unused)]
 pub struct VecGymEnv {
     env: PyObject,
     action_space: usize,
@@ -21,6 +21,7 @@ fn w(res: PyErr) -> candle::Error {
     candle::Error::wrap(res)
 }
 
+#[allow(unused)]
 impl VecGymEnv {
     pub fn new(name: &str, img_dir: Option<&str>, nprocesses: usize) -> Result<VecGymEnv> {
         Python::with_gil(|py| {
diff --git a/candle-pyo3/Cargo.toml b/candle-pyo3/Cargo.toml
index 2776a3f77c..d91619fbb3 100644
--- a/candle-pyo3/Cargo.toml
+++ b/candle-pyo3/Cargo.toml
@@ -20,7 +20,7 @@ candle-nn = { workspace = true }
 candle-onnx = { workspace = true, optional = true }
 half = { workspace = true }
 intel-mkl-src = { workspace = true, optional = true }
-pyo3 = { version = "0.22.0", features = ["extension-module", "abi3-py38"] }
+pyo3 = { version = "0.22.0", features = ["extension-module", "abi3-py311"] }
 
 [build-dependencies]
 pyo3-build-config = "0.22"
diff --git a/candle-transformers/src/models/encodec.rs b/candle-transformers/src/models/encodec.rs
index a8d509ce8b..517b9b1d7e 100644
--- a/candle-transformers/src/models/encodec.rs
+++ b/candle-transformers/src/models/encodec.rs
@@ -4,9 +4,8 @@
 //!
 //! Based on implementation from [huggingface/transformers](https://github.com/huggingface/transformers/blob/main/src/transformers/models/encodec/modeling_encodec.py)
 
-#![allow(unused)]
 use candle::{DType, IndexOp, Layout, Module, Result, Shape, Tensor, D};
-use candle_nn::{conv1d, Conv1d, Conv1dConfig, ConvTranspose1d, VarBuilder};
+use candle_nn::{conv1d, Conv1d, ConvTranspose1d, VarBuilder};
 
 // Encodec Model
 // https://github.com/huggingface/transformers/blob/main/src/transformers/models/encodec/modeling_encodec.py
@@ -226,6 +225,7 @@ impl candle::CustomOp2 for CodebookEncode {
 }
 
 // https://github.com/huggingface/transformers/blob/abaca9f9432a84cfaa95531de4c72334f38a42f2/src/transformers/models/encodec/modeling_encodec.py#L340
+#[allow(unused)]
 #[derive(Clone, Debug)]
 pub struct EuclideanCodebook {
     inited: Tensor,
diff --git a/candle-transformers/src/models/starcoder2.rs b/candle-transformers/src/models/starcoder2.rs
index 833cb0679f..0df5990b89 100644
--- a/candle-transformers/src/models/starcoder2.rs
+++ b/candle-transformers/src/models/starcoder2.rs
@@ -15,7 +15,6 @@
 //! - [Model Card](https://huggingface.co/bigcode/starcoder)
 //!
 
-#![allow(unused)]
 use candle::{DType, Device, Module, Result, Tensor, D};
 use candle_nn::{layer_norm, linear_b, LayerNorm, Linear, VarBuilder};
 use std::sync::Arc;