Clean up type aliases.

yangson/datatype.py

@@ -7,6 +7,9 @@ from .exception import YangsonException
 from .statement import Statement
 from .typealiases import *
 
+# Local type aliases
+Range = List[List[Union[int, decimal.Decimal]]]
+
 class DataType:
     """Abstract class for YANG data types."""
 

yangson/typealiases.py

@@ -11,5 +11,3 @@ ScalarValue = Union[int, Decimal, str]
 NodeName = Tuple[YangIdentifier, YangIdentifier] # (namespace, name)
 SchemaAddress = List[NodeName]
 ModuleId = Tuple[YangIdentifier, Optional[RevisionDate]]
-Range = List[List[Any]]
-PrefixMap = Dict[YangIdentifier, ModuleId]