App init: add PINECONE_NAMESPACE environment variable

1. Resolve issue #48
#48

2. Warn user and exit app if Pinecone API key is set and other Pinecone
keys are not set.

apps/slackbot/.env-sample

@@ -12,5 +12,6 @@ SLACK_VERIFICATION_TOKEN=         # from `Basic Information` page of your Slack
 
 # Pinecone. Optional. Enables cloud-based storage of vector embeddings.
 # PINECONE_API_KEY=                 # The Pinecone vector database API key 
+# PINECONE_NAMESPACE="ReadTheDocs"  # Pinecone namespace to use for documents 
 # PINECONE_ENV=                     # Region where the Pinecone index is deployed
 # PINECONE_INDEX=                   # The Pinecone vector database index

apps/slackbot/bolt_app.py

@@ -54,8 +54,15 @@
   print("App init: loading documents into Chroma:")
   local_memory = LocalChromaStore.from_folder('files', OPENAI_KEY).as_retriever()
 else:
-  print("App init: Pinecone environment variables are set")
-
+  PINECONE_NAMESPACE = environ.get("PINECONE_NAMESPACE", "ReadTheDocs")
+  PINECONE_ENV=environ.get("PINECONE_ENV")
+  PINECONE_INDEX=environ.get("PINECONE_INDEX")
+  if None in [PINECONE_NAMESPACE, PINECONE_ENV, PINECONE_INDEX]:
+    print("App init: Pinecone environment variables not set, app is unable to run")
+    raise SystemExit(1)
+  else:
+    print("App init: Pinecone environment variables are set")
+    print(PINECONE_NAMESPACE)
 
 ###########################################################################
 # Define Slack client functionality:
@@ -218,7 +225,7 @@ def get_response(question, previous_messages):
     if PINECONE_API_KEY:
       # If pinecone API is specified, then use the Pinecone Database
       memory = ConversationStore.get_vector_retrieval(
-        'ReadTheDocs', OPENAI_KEY, index_name=os.getenv("PINECONE_INDEX"), search_type='similarity_score_threshold', search_kwargs={'score_threshold': 0.0}
+        PINECONE_NAMESPACE, OPENAI_KEY, index_name=PINECONE_INDEX, search_type='similarity_score_threshold', search_kwargs={'score_threshold': 0.0}
       )
     else:
       # use the local Chroma database