coverage.py how to exclude contexts

Question

I run different coverage tests each with a different context. After combining them I would like to exclude some contexts from an html report. From my small experience and understanding of the documentation, the context option is only used for filtering the run lines. I would like a way to use contexts to filter on the statement lines.

Options:
  --contexts=REGEX1,REGEX2,...
                        Only display data from lines covered in the given
                        contexts. Accepts Python regexes, which must be
                        quoted.

I am now looking at the Coverage.py API to find a solution