Print the server name on a server exception #445
Description
This is the current state which omits this kind of information:
raceback (most recent call last):
File "/home/travis/build/openml/openml-python/tests/test_runs/test_run_functions.py", line 384, in test_learning_curve_task_1
random_state_value='62501')
File "/home/travis/build/openml/openml-python/tests/test_runs/test_run_functions.py", line 117, in _perform_run
task = openml.tasks.get_task(task_id)
File "/home/travis/build/openml/openml-python/openml/tasks/functions.py", line 297, in get_task
raise e
File "/home/travis/build/openml/openml-python/openml/tasks/functions.py", line 291, in get_task
dataset = get_dataset(task.dataset_id)
File "/home/travis/build/openml/openml-python/openml/datasets/functions.py", line 335, in get_dataset
arff_file = _get_dataset_arff(did_cache_dir, description)
File "/home/travis/build/openml/openml-python/openml/datasets/functions.py", line 429, in _get_dataset_arff
arff_string = openml._api_calls._read_url(url)
File "/home/travis/build/openml/openml-python/openml/_api_calls.py", line 120, in _read_url
raise _parse_server_exception(response, url=url)
File "/home/travis/build/openml/openml-python/openml/_api_calls.py", line 135, in _parse_server_exception
'%d\n' % response.status_code) + response.text)
openml.exceptions.OpenMLServerError: Unexpected server error. Please contact the developers!
Instead it should be like:
openml.exceptions.OpenMLServerError: Unexpected server error on server ???.openml.org. Please contact the developers!
which would help the developer (in this case me who keeps rerunning unit tests) to easily see which server is causing issues.
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