Fix docker error

Author: Brandon Davis

.gitignore

@@ -3,6 +3,7 @@
 *.egg-info/
 .eggs/
 .vscode/
+.python-version
 loginpage_error.html
 venv/
 kobo_downloads/

README.md

@@ -214,10 +214,14 @@ Try enabling debugging.  Run `kobodl --debug book get` (for example), which will
 
 ## Development
 
-This project uses [Python Poetry](https://python-poetry.org/).
+This project uses [Python Poetry](https://python-poetry.org/). I also personally like `pyenv` and the pyenv-virtualenv addon. I install these with homebrew (MacOS).
 
 ```bash
-pip install poetry
+# Optional if you use pyenv
+pyenv install 3.11
+pyenv virtualenv 3.11 kobo-book-downloader
+echo "kobo-book-downloader" >> .python-version
+
 git clone https://github.com/subdavis/kobo-book-downloader
 cd kobo-book-downloader
 poetry install

kobodl/kobo.py

@@ -10,7 +10,7 @@
 import urllib
 from enum import Enum
 from shutil import copyfile
-from typing import Dict, Tuple
+from typing import Dict, Tuple, Union
 
 import requests
 from bs4 import BeautifulSoup
@@ -73,7 +73,7 @@ def __GetHeaderWithAccessToken(self) -> dict:
         headers = {"Authorization": authorization}
         return headers
 
-    def __CheckActivation(self, activationCheckUrl) -> Tuple[str, str, str] | None:
+    def __CheckActivation(self, activationCheckUrl) -> Union[Tuple[str, str, str], None]:
         response = self.Session.get(activationCheckUrl)
         response.raise_for_status()
         jsonResponse = response.json()