Revert "use PythonReturnType for as python return type"

This reverts commit f806e68.

clvm/SExp.py

@@ -5,7 +5,7 @@
 
 import typing_extensions
 
-from .as_python import PythonReturnType, as_python
+from .as_python import as_python
 from .CLVMObject import CLVMObject, CLVMStorage
 
 from .EvalError import EvalError
@@ -196,7 +196,7 @@ def to(cls: typing.Type[_T_SExp], v: typing.Any) -> _T_SExp:
         # this will lazily convert elements
         return cls(to_sexp_type(v))
 
-    def cons(self: _T_SExp, right: CastableType) -> _T_SExp:
+    def cons(self: _T_SExp, right: _T_SExp) -> _T_SExp:
         return self.to((self, right))
 
     def first(self: _T_SExp) -> _T_SExp:
@@ -249,7 +249,7 @@ def list_len(self) -> int:
             v = v.rest()
         return size
 
-    def as_python(self) -> PythonReturnType:
+    def as_python(self) -> typing.Any:
         return as_python(self)
 
     def __str__(self) -> str:

clvm/as_python.py

@@ -53,12 +53,10 @@ def _as_python(op_stack: OpStackType, val_stack: ValStackType) -> None:
         val_stack.append(t.atom)  # type:ignore[arg-type]
 
 
-def as_python(sexp: SExp) -> PythonReturnType:
+def as_python(sexp: SExp) -> Any:
     op_stack: OpStackType = [_as_python]
     val_stack: ValStackType = [sexp]
     while op_stack:
         op_f = op_stack.pop()
         op_f(op_stack, val_stack)
-    result = val_stack[-1]
-    assert not isinstance(result, SExp)
-    return result
+    return val_stack[-1]