If you claim to be an expert, it's reasonable for the interviewer to pass on you if he doesn't think you are an expert. This is a great way of saying you have s

If you claim to be an expert, it's reasonable for the interviewer to pass on you if he doesn't think you are an expert. This is a great way of saying you have some familiarity without the interviewer ever interpreting it as you think you're an expert. It could provide a lot of value in that way -- if someone only claims to have a '4' for Python, I probably won't expect them to know that you shouldn't put [] as a default value for a kwarg.