Suppress uproot3 future warnings

km3io/__init__.py

@@ -2,6 +2,9 @@ from pkg_resources import get_distribution, DistributionNotFound
 
 version = get_distribution(__name__).version
 
+import warnings
+warnings.simplefilter(action='ignore', category=FutureWarning)  # uproot3
+
 from .offline import OfflineReader
 from .online import OnlineReader
 from .gseagen import GSGReader

km3io/utils/kprinttree.py

@@ -14,6 +14,9 @@ Options:
     -h --help    Show this screen.
 
 """
+import warnings
+warnings.simplefilter(action='ignore', category=FutureWarning)
+
 import uproot3