Update _erg_bytes.py

crates/erg_compiler/lib/core/_erg_bytes.py

@@ -1,3 +1,6 @@
+from _erg_result import Error
+from _erg_range import Range
+
 class Bytes(bytes):
     def try_new(b):  # -> Result[Nat]
         if isinstance(b, bytes):
@@ -6,7 +9,6 @@ def try_new(b):  # -> Result[Nat]
             return Error("not a bytes")
 
     def __getitem__(self, index_or_slice):
-        from _erg_range import Range
         if isinstance(index_or_slice, slice):
             return Bytes(bytes.__getitem__(self, index_or_slice))
         elif isinstance(index_or_slice, Range):