Dictionaries in python

Question

if I have:

fib = {1:1,2:1,3:2,4:3}

print(fib.get(4,0) + fib.get(7,5)

I thought the fib.get(4,0) would change the value of key 4 to 0. Instead I get the output 8, can anyone elaborate a little more about this please?

Answer 1

The function dict.get(key, default=None) returns the value associated with key if the dictionary has the key or default if it does not exists

That's why, when you write fib.get(4,0), it returns 3, the key 4 exists and so, it returns its value 3

For fib.get(7,5), 7 is not a valid key, thus it returns the default which is 5

Answer 2

Thank you very much!