fix: fix chainlit sets logging while act as a library (#2683)

fix #2682





<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Stop Chainlit from changing global logging when imported as a library.
Move logging.basicConfig to the CLI entrypoint and remove it from
chainlit.logger, while keeping socketio/engineio loggers at ERROR.

<sup>Written for commit aff41d1.
Summary will update automatically on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

---------

Co-authored-by: cubic-dev-ai[bot] <191113872+cubic-dev-ai[bot]@users.noreply.github.com>
Co-authored-by: Josh Hayes <[email protected]>

Author: 3 people

backend/chainlit/cli/__init__.py

@@ -1,5 +1,7 @@
 import asyncio
+import logging
 import os
+import sys
 
 import click
 import nest_asyncio
@@ -26,6 +28,13 @@
 from chainlit.secret import random_secret
 from chainlit.utils import check_file
 
+logging.basicConfig(
+    level=logging.INFO,
+    stream=sys.stdout,
+    format="%(asctime)s - %(levelname)s - %(name)s - %(message)s",
+    datefmt="%Y-%m-%d %H:%M:%S",
+)
+
 
 def assert_app():
     if (

backend/chainlit/logger.py

@@ -1,12 +1,4 @@
 import logging
-import sys
-
-logging.basicConfig(
-    level=logging.INFO,
-    stream=sys.stdout,
-    format="%(asctime)s - %(message)s",
-    datefmt="%Y-%m-%d %H:%M:%S",
-)
 
 logging.getLogger("socketio").setLevel(logging.ERROR)
 logging.getLogger("engineio").setLevel(logging.ERROR)