From e9d863ae2c09d331eaec534b2057b71805442178 Mon Sep 17 00:00:00 2001
From: David Huard <huard.david@ouranos.ca>
Date: Thu, 12 Jan 2023 11:17:18 -0500
Subject: [PATCH] fix previous commit for xml

---
 owslib/feature/postrequest.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/owslib/feature/postrequest.py b/owslib/feature/postrequest.py
index 14a5d813..f8429e8b 100644
--- a/owslib/feature/postrequest.py
+++ b/owslib/feature/postrequest.py
@@ -175,8 +175,10 @@ def set_filter(self, filter):
         """
         if isinstance(filter, str):
             f = etree.fromstring(filter)
-            # If this raises an error, it means the filter string does not contain an actual Filter node.
-            sub_elem = f.xpath("//FES:Filter", namespaces={"FES": FES_NAMESPACE})[0]
+            if f.tag == util.nspath("Filter", FES_NAMESPACE):
+                sub_elem = f
+            else:
+                sub_elem = f.find(util.nspath("Filter", FES_NAMESPACE))
 
         else:
             sub_elem = filter