Wrap star function for better exception

Author: samedii

datastream/tools/star.py

@@ -1,4 +1,9 @@
+from functools import wraps
+
 
 def star(fn):
     '''Wrap function to expand input to arguments'''
-    return lambda args: fn(*args)
+    @wraps(fn)
+    def wrapper(args):
+        return fn(*args)
+    return wrapper