Python For Not In [duplicate]

Question

I have a dict test declared:

test = {'test1': 1, 'test2': 2, 'test3': 3}

And I want to make a copy of test filtering out specific keys that may or may not exist.

I tried the following:

test_copy = {k: test[k] for k not in ('test3', 'test4')}

However Python does not seem to like for not in loops. Is there any way to do this nicely in one line?

I do not believe this question is a duplicate of List comprehension with if statement because I was searching for more than a few minutes specifically for dicts.

Answer 1

The dictionary comprehension test_copy = {k: test[k] for k in test if k not in EXCLUDED_KEYS} will accomplish the copying.

Answer 2

You need to state the "not in" in the conditional:

test_copy = {k: test[k] for k in test if k not in ('test3', 'test4')}