getting value from a tuple of tuple

Question

I am new to python, I need help with how can I get the returning values from a function call. I tried doing this which is apparently wrong I need to assign the returning values to the mentioned variables and I cant make changes on how I return the values from the function as that is what is needed in the question.

((cross_low,cross_high),cross_sum)=find_maximum_crossing_subarray(A,low,mid,high)

I am returning this type of value from the find_maximum_crossing_subarray function:

tup=(max_left,max_right)
tup1=(tup,left_sum+right_sum)
return tup1

Answer 1

只需删除外面的括号：

(cross_low, cross_high), cross_sum = find_maximum_crossing_subarray(A,low,mid,high)

Answer 2

That's really strange syntax, but basically you're being shown the return signature from find_maximum_crossing_subarray(..) .

You can see a simplified version,

def some_function():
    return (1, 2), 3

x = ((a, b), c) = some_function()

print(x, a, b, c)

...
... output:
((1, 2), 3) 1 2 3

Notice how I still had access to a , b , and c . Similarly, you will have access to your cross_* variables.

If you need to find the max of something, max is a built-in function, and so is sum .

---

If you can change the return signature of find_maximum_crossing_subarray(..) I would do this instead:

    # ..
    return max_left, max_right, left_sum + right_sum


results = find_maximum(A, low, mid, high)

cross_low, cross_high, cross_sum = results