diff --git a/bindings/python/src/pre_tokenizers.rs b/bindings/python/src/pre_tokenizers.rs
index cb4f92ff1..113a90d9c 100644
--- a/bindings/python/src/pre_tokenizers.rs
+++ b/bindings/python/src/pre_tokenizers.rs
@@ -664,7 +664,15 @@ impl Serialize for PyPreTokenizerWrapper {
 #[serde(untagged)]
 // #[display(fmt = "")]
 pub(crate) enum PyPreTokenizerTypeWrapper {
-    #[display(fmt = "[{}]", "_0.iter().map(|d| d.as_ref().read().unwrap().to_string()).collect::<Vec<_>>().join(\", \")")]
+    #[display(fmt = "[{}]", "_0_0.iter()
+    .map(|d| d.as_ref().read().unwrap().to_string())
+    .fold(String::new(), |mut acc, s| {
+        if !acc.is_empty() {
+            acc.push_str(", ");
+        }
+        acc.push_str(&s);
+        acc
+    })")]
     Sequence(Vec<Arc<RwLock<PyPreTokenizerWrapper>>>),
     #[display(fmt ="{}", "_0.as_ref().read().unwrap()")]
     Single(Arc<RwLock<PyPreTokenizerWrapper>>),