ECG_detector_wrapper.py error on TUH dataset entries

[borisbaldassari]

Using ECG_detector_wrapper.py at 20e24c5 on the TUH - TUSZ/dev dataset.

The script works well (on hundreds of files) until it hits dev/03_tcp_ar_a/022/00002297/s003_2007_10_23/00002297_s003_t000.edf. Other files fail as well, with the same error.

Statistics:

• 367 files Fail
• 945 files OK

Error is

(env) $ python3 ECG_detector_wrapper.py --i TUH/v1.5.2/edf/dev/03_tcp_ar_a/022/00002297/s003_2007_10_23/00002297_s003_t000.edf -o test.json
Traceback (most recent call last):
  File "ECG_detector_wrapper.py", line 192, in <module>
    raise ValueError("Invalid ECG channels - " + str(n_ecg_channels))
ValueError: Invalid ECG channels - 0

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "ECG_detector_wrapper.py", line 258, in <module>
    json.dump({"error": e} , open(output_filename, "w"))
  File "/usr/lib/python3.7/json/__init__.py", line 179, in dump
    for chunk in iterable:
  File "/usr/lib/python3.7/json/encoder.py", line 431, in _iterencode
    yield from _iterencode_dict(o, _current_indent_level)
  File "/usr/lib/python3.7/json/encoder.py", line 405, in _iterencode_dict
    yield from chunks
  File "/usr/lib/python3.7/json/encoder.py", line 438, in _iterencode
    o = _default(o)
  File "/usr/lib/python3.7/json/encoder.py", line 179, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type ValueError is not JSON serializable