Fix the anchor configuration mechanism

[zhiqwang]

Close #170 .

[codecov]

Codecov Report

Merging #202 (bdeb0f2) into main (fab48d7) will increase coverage by 0.14%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #202      +/-   ##
==========================================
+ Coverage   96.83%   96.98%   +0.14%     
==========================================
  Files          10       10              
  Lines         601      630      +29     
==========================================
+ Hits          582      611      +29     
  Misses         19       19              

Flag	Coverage Δ
unittests	96.98% <100.00%> (+0.14%)	⬆️

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Impacted Files	Coverage Δ
test/test_utils.py	100.00% <100.00%> (ø)

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