Python assert all elements in list is not none [duplicate]

Question

I was wondering if we could assert all elements in a list is not None, therefore while a = None will raise an error.

The sample list is [a, b, c]

I have tried assert [a, b, c] is not None, it will return True if any one of the elements is not None but not verifying all. Could you help figure it out? Thanks!!

Answer 1

Unless you have a weird element that claims it equals None:

assert None not in [a, b, c]

Answer 2

Do you mean by all:

>>> assert all(i is not None for i in ['a', 'b', 'c'])
>>>

Or just simply:

assert None not in ['a', 'b', 'c']

P.S just noticed that @don'ttalkjustcode added the above.

Or with min:

>>> assert min(a, key=lambda x: x is not None, default=False)
>>>