fix(nyz): fix py38 unittest bugs

[PaParaZz1]

Description

Related Issue

TODO

Check List

• merge the latest version source branch/repo, and resolve all the conflicts
• pass style check
• pass all the tests

[codecov]

Codecov Report

Merging #565 (05a006b) into main (c30818a) will decrease coverage by 0.23%.
The diff coverage is 84.00%.

@@            Coverage Diff             @@
##             main     #565      +/-   ##
==========================================
- Coverage   84.81%   84.57%   -0.24%     
==========================================
  Files         555      555              
  Lines       44673    45197     +524     
==========================================
+ Hits        37889    38226     +337     
- Misses       6784     6971     +187     

Flag	Coverage Δ
unittests	84.57% <84.00%> (-0.24%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...s/env_manager/tests/test_gym_vector_env_manager.py	25.00% <50.00%> (-75.00%)	⬇️
ding/data/level_replay/level_sampler.py	60.57% <66.66%> (+0.19%)	⬆️
ding/framework/middleware/tests/test_logger.py	60.10% <80.00%> (-29.31%)	⬇️
ding/envs/env_manager/tests/conftest.py	88.75% <87.50%> (-6.90%)	⬇️
...ng/envs/env_manager/tests/test_base_env_manager.py	100.00% <100.00%> (ø)
...s/env_manager/tests/test_subprocess_env_manager.py	71.89% <100.00%> (+0.62%)	⬆️
ding/framework/task.py	93.55% <100.00%> (+0.06%)	⬆️
ding/torch_utils/loss/multi_logits_loss.py	97.56% <100.00%> (ø)
ding/envs/env_manager/gym_vector_env_manager.py	25.88% <0.00%> (-69.42%)	⬇️
... and 214 more

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