Copy a dictionary, except some keys

[facundo (Facundo Batista)]

@mjpieters

You can make your dict comprehension more concise by using the keys() dictionary view:

new_dict = {k: old_dict[k] for k in old_dict.keys() - {'key1', 'key2'}}

I expect this to be really slower, as you’re accesing the old dict for every key! I’ve run both snippets in timeit and this shows a ~33% slowdown.