From 4bf291a8324a7d66c5a730995444c8a701e5effd Mon Sep 17 00:00:00 2001
From: Philipp Rohde <Philipp.Rohde@tib.eu>
Date: Thu, 6 Jul 2023 08:37:01 +0200
Subject: [PATCH] fix sklearn v1.3 import for MissingValues

fixes #995, fixes #996, closes #997
---
 imblearn/utils/_param_validation.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/imblearn/utils/_param_validation.py b/imblearn/utils/_param_validation.py
index ae3855945..538e454c9 100644
--- a/imblearn/utils/_param_validation.py
+++ b/imblearn/utils/_param_validation.py
@@ -917,7 +917,6 @@ def generate_valid_param(constraint):
         _CVObjects,
         _InstancesOf,
         _IterablesNotString,
-        _MissingValues,
         _NoneConstraint,
         _PandasNAConstraint,
         _RandomStates,
@@ -926,3 +925,8 @@ def generate_valid_param(constraint):
         make_constraint,
         validate_params,
     )
+
+    if sklearn_version < parse_version("1.3"):
+        from sklearn.utils._param_validation import _MissingValues
+    else:
+        from sklearn.utils._param_validation import MissingValues as _MissingValues