Python: find closest key in a dictionary from the given input key

Question

I have a data in form a dictionary.. NOw I take the input from the user and it can be anything.. And I am trying to do the following. If the key exists then cool.. fetch the

Answer 1

here's your function on one line:

data.get(num, data[min(data.keys(), key=lambda k: abs(k-num))])

edit: to not evaluate the min when the key is in the dict use:

data[num] if num in data else data[min(data.keys(), key=lambda k: abs(k-num))]

or if all values in data evaluate to True you can use:

data.get(num) or data[min(data.keys(), key=lambda k: abs(k-num))]