From 4f52923069bf5797d403faf2e5a4f19be56ab14b Mon Sep 17 00:00:00 2001
From: Raphael Vallat <raphaelvallat9@gmail.com>
Date: Sat, 29 Jul 2023 14:30:24 +0200
Subject: [PATCH] Fix in flatten_list for Python 3.12

---
 pingouin/utils.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pingouin/utils.py b/pingouin/utils.py
index 3613bf8d..df4e4587 100644
--- a/pingouin/utils.py
+++ b/pingouin/utils.py
@@ -297,8 +297,6 @@ def _flatten_list(x, include_tuple=False):
     # If x is not iterable, return x
     if not isinstance(x, collections.abc.Iterable):
         return x
-    # Remove None
-    x = list(filter(None.__ne__, x))
     # Initialize empty output variable
     result = []
     # Loop over items in x
@@ -315,6 +313,8 @@ def _flatten_list(x, include_tuple=False):
                     result.append(el)
         else:
             result.append(el)
+    # Remove None from output
+    result = [r for r in result if r is not None]
     return result