Warnings unable to be surpressed
Created originally on Bitbucket by jdoherty1 (James Doherty)
Following on from #983 (closed), the change to warnings.simplefilter() doesn't appear to fix the issue. Warnings are opt in (enabled by passing -Wd to python) but the simplefilter call is still forcing warnings to be displayed when -Wd is not used. The simple fix is to remove the call to simplefilter. I can produce a pull request if required.