diff --git a/.gitignore b/.gitignore
index 39a57f4..71b9c0f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,5 @@ Cargo.lock
 **/__pycache__
 docs/source/generated
 docs/build
+
+venv
diff --git a/build.rs b/build.rs
index 236f970..dd1f633 100644
--- a/build.rs
+++ b/build.rs
@@ -1,10 +1,10 @@
 use std::env;
 
 pub fn main() {
-    println!("cargo::rustc-check-cfg=cfg(pyi)");
+//    println!("cargo::rustc-check-cfg=cfg(pyi)");
     if let Ok(flag) = env::var("INCLUDE_PYI") {
         if flag == "1" || flag.to_lowercase() == "true" {
             println!("cargo:rustc-cfg=pyi");
         }
     }
-}
\ No newline at end of file
+}
diff --git a/pyhornedowl/__init__.pyi b/pyhornedowl/__init__.pyi
index 848a772..530d10b 100644
--- a/pyhornedowl/__init__.pyi
+++ b/pyhornedowl/__init__.pyi
@@ -4,7 +4,6 @@ from typing_extensions import deprecated
 
 import model
 
-
 class PyIndexedOntology:
     """
     Represents a loaded ontology.
@@ -257,7 +256,7 @@ class PyIndexedOntology:
         """
         ...
 
-    def get_ancestors(self, onto: PyIndexedOntology, child: str, iri_is_absolute: Optional[bool] = None) -> Set[str]:
+    def get_ancestors(self, child: str, iri_is_absolute: Optional[bool] = None) -> Set[str]:
         """
         Gets all direct and indirect super classes of a class.
         """
diff --git a/src/model.rs b/src/model.rs
index ff36077..32dbc9f 100644
--- a/src/model.rs
+++ b/src/model.rs
@@ -1,6 +1,6 @@
-use std::{borrow::Borrow, collections::BTreeSet, sync::Arc};
+use std::{borrow::Borrow, collections::{BTreeSet,hash_map::DefaultHasher}, sync::Arc};
 use std::fmt::{Display, Write};
-use std::hash::{DefaultHasher, Hash, Hasher};
+use std::hash::{Hash, Hasher};
 
 use horned_owl::model::ArcStr;
 use paste::paste;