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Runtime error in new release 1.2.0 `could not convert string to float`.

See original GitHub issue

Hello!

I have faced with the next error in new version 1.2.0 of motmetrics:

Traceback (most recent call last):
  File "tools/run_evaluate.py", line 154, in <module>
    main()
  File "tools/run_evaluate.py", line 145, in main
    names=['video ' + str(i) for i in range(len(accs))])
  File "/home/dmitry/virtualenv/mcmt_env/lib/python3.5/site-packages/motmetrics/metrics.py", line 285, in compute_many
    for acc, analysis, name in zip(dfs, anas, names)]
  File "/home/dmitry/virtualenv/mcmt_env/lib/python3.5/site-packages/motmetrics/metrics.py", line 285, in <listcomp>
    for acc, analysis, name in zip(dfs, anas, names)]
  File "/home/dmitry/virtualenv/mcmt_env/lib/python3.5/site-packages/motmetrics/metrics.py", line 173, in compute
    df = df.events
  File "/home/dmitry/virtualenv/mcmt_env/lib/python3.5/site-packages/motmetrics/mot.py", line 320, in events
    self.cached_events_df = MOTAccumulator.new_event_dataframe_with_data(self._indices, self._events)
  File "/home/dmitry/virtualenv/mcmt_env/lib/python3.5/site-packages/motmetrics/mot.py", line 366, in new_event_dataframe_with_data
    pd.Series(events['OId'], dtype=float, name='OId'),
  File "/home/dmitry/virtualenv/mcmt_env/lib/python3.5/site-packages/pandas/core/series.py", line 262, in __init__
    raise_cast_failure=True)
  File "/home/dmitry/virtualenv/mcmt_env/lib/python3.5/site-packages/pandas/core/internals/construction.py", line 607, in sanitize_array
    raise_cast_failure)
  File "/home/dmitry/virtualenv/mcmt_env/lib/python3.5/site-packages/pandas/core/internals/construction.py", line 706, in _try_cast
    copy=copy)
  File "/home/dmitry/virtualenv/mcmt_env/lib/python3.5/site-packages/pandas/core/dtypes/cast.py", line 1243, in construct_1d_ndarray_preserving_na
    subarr = np.array(values, dtype=dtype, copy=copy)
ValueError: could not convert string to float: 'ID 3'

The source code is here multi_camera_multi_person_tracking. With the previous version it works OK.

Issue Analytics

State:
Created 4 years ago
Comments:5

Top GitHub Comments

1reaction

DmitriySidnevcommented, Feb 7, 2020

Yes, it works. Thank you very much! Closed.

0reactions

mattiasegucommented, Jul 21, 2021

Hey @jvlmdr, actually I think there might be some reasons for keep using strings instead of integers as IDs. This is an example of label ID in the Waymo dataset: 'fc684759-bbe2-4341-83b0-249b3b5d3c1e'. You can see how this is incompatible with the current implementation using integers.

Can you think of any workaround, or the solution would be to revert to using strings?