Revert "Update ray to 2.7.2 (#2789)" (#2790)

This reverts commit c8967f4.

Author: malfet

beginner_source/hyperparameter_tuning_tutorial.py

@@ -52,9 +52,6 @@
 from ray.air import Checkpoint, session
 from ray.tune.schedulers import ASHAScheduler
 
-# TODO: Migrate to ray.train.Checkpoint and remove following line
-os.environ["RAY_AIR_NEW_PERSISTENCE_MODE"]="0"
-
 ######################################################################
 # Most of the imports are needed for building the PyTorch model. Only the last three
 # imports are for Ray Tune.
@@ -455,8 +452,8 @@ def main(num_samples=10, max_num_epochs=10, gpus_per_trial=2):
     # Fixes ``AttributeError: '_LoggingTee' object has no attribute 'fileno'``.
     # This is only needed to run with sphinx-build.
     import sys
-    if not not hasattr(sys.stdout, "encoding"):
-        sys.stdout.encoding = "latin1"
+
+    sys.stdout.fileno = lambda: False
     # sphinx_gallery_end_ignore
     # You can change the number of GPUs per trial here:
     main(num_samples=10, max_num_epochs=10, gpus_per_trial=0)

requirements.txt

@@ -20,7 +20,7 @@ bs4
 awscliv2==2.1.1
 flask
 spacy==3.4.1
-ray[tune]==2.7.2
+ray[tune]==2.4.0
 tensorboard
 jinja2==3.1.3
 pytorch-lightning