fix mypy errs

Author: BobTheBuidler

mypyc/irbuild/expression.py

@@ -85,7 +85,7 @@
 )
 from mypyc.irbuild.ast_helpers import is_borrow_friendly_expr, process_conditional
 from mypyc.irbuild.builder import IRBuilder, int_borrow_friendly_op
-from mypyc.irbuild.constant_fold import constant_fold_expr
+from mypyc.irbuild.constant_fold import ConstantValue, constant_fold_expr
 from mypyc.irbuild.for_helpers import (
     comprehension_helper,
     raise_error_if_contains_unreachable_names,
@@ -1017,7 +1017,7 @@ def _visit_tuple_display(builder: IRBuilder, expr: TupleExpr) -> Value:
 
 def dict_literal_values(
     builder: IRBuilder, items: Sequence[tuple[Expression | None, Expression]], line: int
-) -> dict | None:
+) -> dict[ConstantValue, ConstantValue] | None:
     """Try to extract a constant dict from a dict literal, recursively staticizing nested dicts.
 
     If all keys and values are deeply immutable and constant (including nested dicts as values),