missing import "plot_evolution" in train.py

[weiwei2027]

🐛 Bug

A clear and concise description of what the bug is.
line 551 in tarin.py "plot_evolution" was not imported. it should be imported from "utils.general". The problem still exists after the commit 941cb26 (Aug 4, 2020).

[github-actions]

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[lorenzomammana]

Hey @WangWeiwei27 i've submitted just now a PR addressing this issue and a missing import in detect.py, this should be solved soon!

[weiwei2027]

ok, thanks @lorenzomammana

[glenn-jocher]

This has been fixed in PR #627