anyone plzz ?

Question

What is the result of this code?
fib = {1: 1, 2: 1, 3: 2, 4: 3}
print(fib.get(4, 0) + fib.get(7, 5))

Answer 1

Should be 8, I think.
fib.get(4, 0) calls fib[4], which equals 3
fib.get(7, 5) calls fib[7], which doesn't exist and so assumes 5
Then 3+5 equals 8

Answer 2

.get() method takes two arguments to determine its returned value. It tries to return the value assigned to the dictionary's key equal to its first argument and if fails (the specified key does not exist in the dictionary) - it returns the second argument.

So the first fib.get looks for the value assigned to the key 4 in the fib dictionary. It finds it - fib[4] equals 3. Then fib.get(7,5) tries to find the value of fib[7]. Because such key does not exist, the method returns the second argument as value - it is equal to 5, so 5 is returned.

Answer 3

how do we assume the number 5 but not others why ? @kuba