1 files changed, 4 insertions, 5 deletions
diff --git a/lib/sly/ast.py b/lib/sly/ast.py
index 7b79ac5..05802bd 100644
--- a/lib/sly/ast.py
+++ b/lib/sly/ast.py
@@ -1,25 +1,24 @@
 # sly/ast.py
 import sys
 
+
 class AST(object):
-    
     @classmethod
     def __init_subclass__(cls, **kwargs):
         mod = sys.modules[cls.__module__]
-        if not hasattr(cls, '__annotations__'):
+        if not hasattr(cls, "__annotations__"):
             return
 
         hints = list(cls.__annotations__.items())
 
         def __init__(self, *args, **kwargs):
             if len(hints) != len(args):
-                raise TypeError(f'Expected {len(hints)} arguments')
+                raise TypeError(f"Expected {len(hints)} arguments")
             for arg, (name, val) in zip(args, hints):
                 if isinstance(val, str):
                     val = getattr(mod, val)
                 if not isinstance(arg, val):
-                    raise TypeError(f'{name} argument must be {val}')
+                    raise TypeError(f"{name} argument must be {val}")
                 setattr(self, name, arg)
 
         cls.__init__ = __init__
-