Update app.py

app.py

@@ -11,7 +11,11 @@ _assistant, _thread = None, None
 def create_assistant(client):
     assistant = client.beta.assistants.create(
         name="Python Code Generator",
-        instructions="You are a Python programming language expert that generates Pylint-compliant code and explains it. Only execute code when explicitly asked to.",
+        instructions=(
+                         "You are a Python programming language expert that "
+                         "generates Pylint-compliant code and explains it. "
+                         "Only execute code when explicitly asked to."
+                     ),
         model="gpt-4o",
         tools=[
                   {"type": "code_interpreter"},