fixes

.pylintrc

@@ -0,0 +1,2 @@
+[MAIN]
+source-roots=src/

src/tree.py

@@ -13,19 +13,19 @@ class Tree:
       return f"{leaf}"
     return "<empty>"
 
-def build_tree(args: Tuple):
+def build_tree(args):
   if args == None: 
     return None
 
   if not isinstance(args, tuple):
-    raise "Invalid argument"
+    raise RuntimeError("Invalid argument")
 
   if len(args) != 3:
-    raise "Invalid number of parameters in the tuple"
+    raise RuntimeError("Invalid number of parameters in the tuple")
 
   value, right, left = args 
 
   if (not isinstance(right, tuple) and right != None) or (not isinstance(left, tuple) and left != None):
-    raise "Nodes must be tuples"
+    raise RuntimeError("Nodes must be tuples")
 
   return Tree(value, build_tree(right), build_tree(left))