typing

src/ifcopenshell-python/ifcopenshell/express/bootstrap.py

@@ -207,6 +207,7 @@ if __name__ == "__main__":
     print("""
 # This file is generated by IfcOpenShell ifcexpressparser bootstrap.py
 
+from __future__ import annotations
 import os
 import sys
 import pickle
@@ -217,7 +218,7 @@ import mapping
 from pyparsing import *
 from nodes import *
 
-def parse(fn):
+def parse(fn: str) -> mapping.Mapping:
     cache_file = fn + ".cache.dat"
     if os.path.exists(cache_file) and os.path.getmtime(cache_file) >= os.path.getmtime(fn):
         with open(cache_file, "rb") as f: