Do explicit imports instead of pyo3::prelude::*

src/builder.rs

@@ -3,7 +3,7 @@
 use thiserror::Error;
 
 #[cfg(feature = "pyo3")]
-use pyo3::{create_exception, exceptions::PyException, prelude::*};
+use pyo3::{create_exception, exceptions::PyException, PyErr};
 
 use crate::hugr::{HugrError, Node, ValidationError, Wire};
 use crate::ops::handle::{BasicBlockID, CfgID, ConditionalID, DfgID, FuncID, TailLoopID};

src/hugr.rs

@@ -23,7 +23,7 @@ use portgraph::{Hierarchy, NodeIndex, PortMut, UnmanagedDenseMap};
 use thiserror::Error;
 
 #[cfg(feature = "pyo3")]
-use pyo3::{create_exception, exceptions::PyException, prelude::*};
+use pyo3::{create_exception, exceptions::PyException, pyclass};
 
 pub use self::views::HugrView;
 use crate::extension::{

src/hugr/serialize.rs

@@ -6,7 +6,7 @@ use std::collections::HashMap;
 use thiserror::Error;
 
 #[cfg(feature = "pyo3")]
-use pyo3::{create_exception, exceptions::PyException, prelude::*};
+use pyo3::{create_exception, exceptions::PyException, PyErr};
 
 use crate::extension::ExtensionSet;
 use crate::hugr::{Hugr, NodeType};

src/hugr/validate.rs

@@ -10,7 +10,7 @@ use portgraph::{LinkView, PortView};
 use thiserror::Error;
 
 #[cfg(feature = "pyo3")]
-use pyo3::{create_exception, exceptions::PyException, prelude::*};
+use pyo3::{create_exception, exceptions::PyException, PyErr};
 
 use crate::extension::SignatureError;
 use crate::extension::{

src/hugr/views/sibling_subgraph.rs

@@ -27,7 +27,7 @@ use crate::{
 use super::HugrView;
 
 #[cfg(feature = "pyo3")]
-use pyo3::{create_exception, exceptions::PyException, prelude::*};
+use pyo3::{create_exception, exceptions::PyException, PyErr};
 
 /// A non-empty convex subgraph of a HUGR sibling graph.
 ///

src/std_extensions/rotation.rs

@@ -8,7 +8,7 @@ use num_rational::Rational64;
 use smol_str::SmolStr;
 
 #[cfg(feature = "pyo3")]
-use pyo3::prelude::*;
+use pyo3::{pyclass, FromPyObject};
 
 use crate::extension::ExtensionId;
 use crate::types::type_param::TypeArg;

src/types.rs

@@ -26,7 +26,7 @@ use std::fmt::Debug;
 use self::primitive::PrimType;
 
 #[cfg(feature = "pyo3")]
-use pyo3::prelude::*;
+use pyo3::pyclass;
 
 /// The kinds of edges in a HUGR, excluding Hierarchy.
 #[derive(Clone, PartialEq, Eq, Debug, serde::Serialize, serde::Deserialize)]

src/types/signature.rs

@@ -1,7 +1,7 @@
 //! Abstract and concrete Signature types.
 
 #[cfg(feature = "pyo3")]
-use pyo3::prelude::*;
+use pyo3::{pyclass, pymethods};
 
 use std::ops::Index;
 

src/types/type_row.rs

@@ -12,7 +12,7 @@ use crate::utils::display_list;
 use delegate::delegate;
 
 #[cfg(feature = "pyo3")]
-use pyo3::prelude::*;
+use pyo3::pyclass;
 
 /// List of types, used for function signatures.
 #[derive(Clone, PartialEq, Eq, Debug, serde::Serialize, serde::Deserialize)]