fix

OstapHEP · Mar 12, 2021 · 9321127 · 9321127
1 parent 9b8f616
commit 9321127
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/ostap/trees/funcs.py b/ostap/trees/funcs.py
@@ -102,7 +102,7 @@ def __init__ ( self , the_function , tree = None ) :
         if tree is None : tree = ROOT.nullptr 
         super(PyTreeFunction,self).__init__ ( tree  )
         assert callable   ( the_function ), \
-               'PyTreeFunction:Invalid callable %s/%s'  ( the_function , type ( the_function ) )
+               'PyTreeFunction:Invalid callable %s/%s' % ( the_function , type ( the_function ) )
         self.__function = the_function
 
     @property