From dab3ec71fab211c79fffafab93dade06226cab65 Mon Sep 17 00:00:00 2001
From: jmcarcell <jmcarcell@users.noreply.github.com>
Date: Wed, 10 Jan 2024 21:24:47 +0100
Subject: [PATCH] Use warnings from the warnings library

---
 python/podio/frame.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/python/podio/frame.py b/python/podio/frame.py
index a1425922e..51de9c9e3 100644
--- a/python/podio/frame.py
+++ b/python/podio/frame.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 """Module for the python bindings of the podio::Frame"""
 
-import sys
+import warnings
 import cppyy
 
 import ROOT
@@ -125,8 +125,8 @@ def collections(self):
     Returns:
         tuple(str): The names of the available collections from this Frame.
     """
-    print('WARNING: collections is deprecated, use getAvailableCollections() (like in C++) instead',
-          file=sys.stderr)
+    warnings.warn('WARNING: collections is deprecated use getAvailableCollections()'
+                  ' (like in C++) instead', FutureWarning)
     return self.getAvailableCollections()
 
   def get(self, name):