(feat) adding support for defining generic symbols (e.g. Symbol[str])

Author: futurisold

symai/symbol.py

@@ -5,12 +5,15 @@
 
 from box import Box
 from json import JSONEncoder
-from typing import Any, Dict, Iterator, List, Optional, Type, Callable, Tuple
+from typing import Any, Dict, Iterator, List, Optional, Type, Callable, Tuple, Generic, TypeVar
 
 from . import core
 from .ops import SYMBOL_PRIMITIVES
 
 
+T = TypeVar('T')
+
+
 class SymbolEncoder(JSONEncoder):
     def default(self, o):
         '''
@@ -204,7 +207,7 @@ def __new__(mcls, name, bases, attrs):
         return cls
 
 
-class Symbol(metaclass=SymbolMeta):
+class Symbol(Generic[T], metaclass=SymbolMeta):
     _mixin                = True
     _primitives           = SYMBOL_PRIMITIVES
     _metadata             = Metadata()