From 6d9090847930f98916253806e828a7afc1fa048e Mon Sep 17 00:00:00 2001
From: Leland McInnes <leland.mcinnes@gmail.com>
Date: Mon, 17 Jul 2023 14:50:41 -0400
Subject: [PATCH] Try pinning cython as less than 3

---
 hdbscan/_hdbscan_tree.pyx | 4 ++--
 requirements.txt          | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/hdbscan/_hdbscan_tree.pyx b/hdbscan/_hdbscan_tree.pyx
index 31ae7dfd..84ffde61 100644
--- a/hdbscan/_hdbscan_tree.pyx
+++ b/hdbscan/_hdbscan_tree.pyx
@@ -106,12 +106,12 @@ cpdef np.ndarray condense_tree(np.ndarray[np.double_t, ndim=2] hierarchy,
             lambda_value = INFTY
 
         if left >= num_points:
-            left_count = <np.intp_t> int(hierarchy[left - num_points][3])
+            left_count = <np.intp_t> hierarchy[left - num_points][3]
         else:
             left_count = 1
 
         if right >= num_points:
-            right_count = <np.intp_t> int(hierarchy[right - num_points][3])
+            right_count = <np.intp_t> hierarchy[right - num_points][3]
         else:
             right_count = 1
 
diff --git a/requirements.txt b/requirements.txt
index 487cfe7b..3532921c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-cython>=0.27
+cython>=0.27,<3
 numpy>=1.20
 scipy>= 1.0
 scikit-learn>=0.20