sherpa-ai/sherpa

Closing MongoDB, IndexError: single positional indexer is out-of-bounds, PBT example

martsalz opened this issue · 2 comments

martsalz commented

When I run the mnistcnnpbt example, the following error message appears:
(Always at trial 20)

INFO:sherpa.core:
-------------------------------------------------------
Submitting Trial 20:
	dropout        =            0.30687144848463904
	load_from      =                              6
	lr             =           0.007697357252133577
	save_to        =                             20
	lineage        =                             6,
	batch_size     =                             16
	generation     =                              2
-------------------------------------------------------

Closing MongoDB!
Traceback (most recent call last):
  File "runner.py", line 67, in <module>
    output_dir='./output')
  File "/home/martin/Desktop/sherpa/sherpa/core.py", line 640, in optimize
    runner.run_loop()
  File "/home/martin/Desktop/sherpa/sherpa/core.py", line 561, in run_loop
    self.submit_new_trials()
  File "/home/martin/Desktop/sherpa/sherpa/core.py", line 522, in submit_new_trials
    next_trial = self.study.get_suggestion()
  File "/home/martin/Desktop/sherpa/sherpa/core.py", line 200, in get_suggestion
    self.lower_is_better)
  File "/home/martin/Desktop/sherpa/sherpa/algorithms/core.py", line 576, in get_suggestion
    lower_is_better=lower_is_better)
  File "/home/martin/Desktop/sherpa/sherpa/algorithms/core.py", line 601, in _truncation_selection
    d = generation_df.iloc[(self.count - 1) % self.population_size].to_dict()
  File "/home/martin/Desktop/venv_sherpa/lib/python3.5/site-packages/pandas/core/indexing.py", line 1328, in __getitem__
    return self._getitem_axis(key, axis=0)
  File "/home/martin/Desktop/venv_sherpa/lib/python3.5/site-packages/pandas/core/indexing.py", line 1749, in _getitem_axis
    self._is_valid_integer(key, axis)
  File "/home/martin/Desktop/venv_sherpa/lib/python3.5/site-packages/pandas/core/indexing.py", line 1638, in _is_valid_integer
    raise IndexError("single positional indexer is out-of-bounds")
IndexError: single positional indexer is out-of-bounds
(venv_sherpa) martin@martin-notebook:~/Desktop/sherpa/examples/parallel-examples/mnistcnnpbt$
LarsHH commented

Working on it. Will have to get back to you.

LarsHH commented

@martsalz for now I think this (new) example is a better reference: https://github.com/sherpa-ai/sherpa/blob/master/examples/keras_mnist_mlp_population_based_training.ipynb . Also please update your Sherpa version before re-running since I have worked on the PBT implementation since.

  • 👍1