Check if two values are either in a dictionary as a key or in a list

Question

I am not sure how to write a logic in the most pythonic way.

I have 2 data types:

d: Dict[str, Any] = {} l: List[str]: []
Now I want to write a condition where I check if at least one of the strings is in either the dictionary(as a key) or in list. I am not sure how to do that in the most pythonic way.

I could obviously write:

if 'str_1' in d.keys() or 'str_2' id d.keys():
     return True
elif 'str_1' in l or 'str_2' id l:
    return True

I am struggling to come up with a way to write this elegantly in a Pythonic way, preferably to have it in one line.

Asked By: J. Donič

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Source

Answer 1

use a ternary expression like this:


l=["a","c"]
d={'b':'yes'}

key = 'b'
result = True if key in d or key in l else False

Clarification

The above is the equivalent of:

result = key in d or key in l

In a ternary expression you are not forced to return boolean.

Answered By: Cristian

Answer 2

Perhaps something like this:

any(item in coll_ for coll_ in (l, d) for item in (‘str_1’,’str_2’))

Answered By: Szilard

Check if two values are either in a dictionary as a key or in a list

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