[FIX] typing syntyax for Python3.9

src/iiif_download/downloader.py

@@ -1,5 +1,5 @@
 from pathlib import Path
-from typing import Optional
+from typing import Optional, Union
 from urllib.parse import unquote
 
 from .config import config
@@ -11,7 +11,7 @@
 class IIIFDownloader:
     """Manages the download of IIIF manifests and their images."""
 
-    def __init__(self, img_dir: Optional[Path | str] = None):
+    def __init__(self, img_dir: Optional[Union[Path, str]] = None):
         self.img_dir = img_dir
 
     @staticmethod
@@ -20,7 +20,7 @@ def add_to_log(log_file, msg: str, mode="a"):
         with open(log_file, mode) as f:
             f.write(f"{msg}\n")
 
-    def download_manifest(self, url: str, save_dir: Optional[Path | str] = None) -> bool | IIIFManifest:
+    def download_manifest(self, url: str, save_dir: Optional[Union[Path, str]] = None) -> bool | IIIFManifest:
         """Download a complete manifest and all its images."""
         url = unquote(url)
         manifest = IIIFManifest(url, img_dir=self.img_dir, manifest_dir_name=save_dir)

src/iiif_download/manifest.py

@@ -32,11 +32,11 @@ class IIIFManifest:
     """
     Mapping of all image names to their URLs.
     """
-    img_mapping: dict[str, str] = {}
+    img_mapping: Dict[str, str] = {}
 
     def __init__(self, url: str, img_dir: Path = None, manifest_dir_name: str = None):
         self.url = url
-        self.content: Optional[dict[str, Any]] = None
+        self.content: Optional[Dict[str, Any]] = None
         self.manifest_dir: Path = (Path(img_dir) if img_dir else config.img_dir) / (
             manifest_dir_name or self.get_dir_name()
         )