This utility function is useful to parse values like the 200m or 300Gi
memory and cpu resources stored in kubernetes manifests.
It uses Decimal as output format as it usually represents typical input
values more accurately and reduces rounding errors.
While this is a really good convention, sometimes one must import
stuff inside a try except block. This block is still at the top, but pycodestyle
treats like it isn't, because it's in an idented block, and the outeer scope.
