reporting alerts when import catkit

[scott-5]

I meet a alert, but it looks like nothing serious.

from catkit.build import molecule
/home/xxx/anaconda3/lib/python3.8/site-packages/CatKit-0.5.4-py3.8.egg/catkit/gen/adsorption.py:517: SyntaxWarning: "is" with a literal. Did you mean "=="?
/home/xxx/anaconda3/lib/python3.8/site-packages/CatKit-0.5.4-py3.8.egg/catkit/gen/adsorption.py:517: SyntaxWarning: "is" with a literal. Did you mean "=="?