Update app.py

app.py

@@ -22,7 +22,7 @@ template = """Use the following pieces of context to answer the question at the
 
 QA_CHAIN_PROMPT = PromptTemplate(input_variables = ["context", "question"], template = template)
 
-rng = random.randrange(1000000).str()
+rng = str(random.randrange(1000000))
 
 CHROMA_DIR  = "docs/chroma" + rng
 YOUTUBE_DIR = "docs/youtube" + rng