UnboundLocalError when calculating HOTA

[mikel-brostrom]

I am running this:

import os
import numpy as np
import motmetrics as mm

def compute_motchallenge(gt_file, test_file):

    df_gt = mm.io.loadtxt(gt_file)
    df_test = mm.io.loadtxt(test_file)

    # Define thresholds for matching
    th_list = np.arange(0.05, 0.99, 0.05)
    # Compare ground truth and test data
    res_list = mm.utils.compare_to_groundtruth_reweighting(df_gt, df_test, "iou", distth=th_list)
    return res_list

def process_multiple_files(gt_files, test_files):
    accumulators = []
    for gt_file, test_file in zip(gt_files, test_files):
        acc = compute_motchallenge(gt_file, test_file)
        accumulators.append(acc)
    
    return accumulators

gt_files = ['./gt.txt']
test_files = ['./test.txt']

accumulators = process_multiple_files(gt_files, test_files)
mh = mm.metrics.create()

summary = mh.compute_many(
    acc,
    metrics=[
        "deta_alpha",
        "assa_alpha",
        "hota_alpha",
    ],
    generate_overall=True,  # `Overall` is the average we need only
)
strsummary = mm.io.render_summary(
    summary.iloc[[-1], :],  # Use list to preserve `DataFrame` type
    formatters=mh.formatters,
    namemap={"hota_alpha": "HOTA", "assa_alpha": "ASSA", "deta_alpha": "DETA"},
)
print(strsummary)

but I get the following error:

  File "/Users/mikel.brostrom/boxmot/try_pymotmetrics.py", line 14, in compute_motchallenge
    res_list = mm.utils.compare_to_groundtruth_reweighting(df_gt, df_test, "iou", distth=th_list)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/mikel.brostrom/Library/Caches/pypoetry/virtualenvs/boxmot-YDNZdsaB-py3.11/lib/python3.11/site-packages/motmetrics/utils.py", line 156, in compare_to_groundtruth_reweighting
    acc.update(oids, hids, 1 - weighted_dists, frameid=fid, similartiy_matrix=dists, th=th)
                                                                              ^^^^^
UnboundLocalError: cannot access local variable 'dists' where it is not associated with a value

The files used:

gt.txt
test.txt

Any idea what the error may be here @Justin900429. Just following the README 😄

[mikel-brostrom]

Fix proposal:

develop...mikel-brostrom:py-motmetrics:patch-1

After this, HOTA runs without problems:

(boxmot-py3.11) ➜  boxmot git:(pymotmetrics) ✗ python3 try_pymotmetrics.py
        DETA  ASSA  HOTA
OVERALL 7.7% 70.0% 23.2%