fix for pydantic and spaces

app.py

@@ -12,9 +12,42 @@ from utils.uploadAndExample import add_upload
 from PIL import Image
 import streamlit as st
 
+import streamlit as st
+import os
+import pkg_resources
+
+# Using this wacky hack to get around the massively ridicolous managed env loading order
+def is_installed(package_name, version):
+    try:
+        pkg = pkg_resources.get_distribution(package_name)
+        return pkg.version == version
+    except pkg_resources.DistributionNotFound:
+        return False
+
+# shifted from below - this must be the first streamlit call; otherwise: problems
 st.set_page_config(page_title = 'Climate Policy Intelligence', 
                    initial_sidebar_state='expanded', layout="wide") 
 
+@st.cache_resource # cache the function so it's not called every time app.py is triggered
+def install_packages():
+    install_commands = []
+
+    if not is_installed("spaces", "0.12.0"):
+        install_commands.append("pip install spaces==0.17.0")
+    
+    if not is_installed("pydantic", "1.8.2"):
+        install_commands.append("pip install pydantic==1.8.2")
+
+    if not is_installed("typer", "0.4.0"):
+        install_commands.append("pip install typer==0.4.0")
+
+    if install_commands:
+        os.system(" && ".join(install_commands))
+
+# install packages if necessary
+install_packages()
+
+
 with st.sidebar:
     # upload and example doc
     choice = st.sidebar.radio(label = 'Select the Document',