[tune] ExperimentAnalysis doesn't expand user as docs imply #8821
Description
What is the problem?
The Ray docs give an example where a path with the "~" operator is included:
https://docs.ray.io/en/master/tune/api_docs/analysis.html#experimentanalysis-tune-experimentanalysis
>>> tune.run(my_trainable, name="my_exp", local_dir="~/tune_results")
>>> analysis = ExperimentAnalysis(
>>> experiment_checkpoint_path="~/tune_results/my_exp/state.json")
This throws an error for me:
from ray.tune import ExperimentAnalysis
analysis = ExperimentAnalysis("~/rayexp/experiment_state-2020-06-06_20-22-19.json")
203 def __init__(self, experiment_checkpoint_path, trials=None):
--> 204 with open(experiment_checkpoint_path) as f:
205 _experiment_state = json.load(f)
206 self._experiment_state = _experiment_state
FileNotFoundError: [Errno 2] No such file or directory: '~/rayexp/experiment_state-2020-06-06_20-22-19.json'
Whereas the corresponding expanded version does not:
from ray.tune import ExperimentAnalysis
from os.path import expanduser
analysis = ExperimentAnalysis(expanduser("~/rayexp/experiment_state-2020-06-06_20-22-19.json"))
Ray version and other system information (Python version, TensorFlow version, OS):
Ray 0.8.5
Python 3.8
Ubuntu 18
Reproduction (REQUIRED)
See description above.