per batch feedback Update train_mu_controller.py

[smilesun]

[codecov-commenter]

Codecov Report

Merging #531 (cb351f7) into fbopt (6b63f60) will decrease coverage by 1.44%. The diff coverage is 70.58%.

@@            Coverage Diff             @@
##            fbopt     #531      +/-   ##
==========================================
- Coverage   93.52%   92.08%   -1.44%     
==========================================
  Files         137      137              
  Lines        5110     5120      +10     
==========================================
- Hits         4779     4715      -64     
- Misses        331      405      +74     

Flag	Coverage Δ
unittests	92.08% <70.58%> (-1.44%)	:arrow_down:

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Files	Coverage Δ
domainlab/algos/trainers/a_trainer.py	95.34% <100.00%> (+0.16%)	:arrow_up:
domainlab/algos/trainers/train_mu_controller.py	86.88% <64.28%> (+27.62%)	:arrow_up:

... and 9 files with indirect coverage changes

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