The given Python code defines a class `MyClass` which has...

The given Python code defines a class MyClass which has two methods: the constructor __init__, and a method called method. Here's what the code does:

1. Class and Constructor (__init__):

   • The __init__ method initializes an instance of MyClass with two attributes:
     • self.lookup: An empty dictionary that will be used to store the indices of numbers encountered so far in self.vals.
     • self.vals: A list of values provided when the class is instantiated.

2. method Function:

   • The method function takes a single argument target.
   • It iterates over the list self.vals using a for loop and tracks both the current value (num) and its index (i).
   • During each iteration, it checks whether the difference between target and the current number (target - num) exists in self.lookup.
   • If it finds the required difference in self.lookup, it indicates that a pair of numbers (current number num and a previous number) adds up to the target. The method then returns a tuple of indices:
     • (self.lookup[target - num], i), which are the indices of the two numbers whose sum equals the target.
   • If the pair isn't found, it adds the current number (num) and its index (i) to self.lookup so that it can be referenced in future iterations.

3. Instantiating MyClass and Using method:

   • An instance of MyClass is created with vals set to [10, 20, 10, 40]:

     a = MyClass([10, 20, 10, 40])
     

   • Then, the method is called twice:

     • In the first call, a.method(50) checks for two numbers in vals whose sum equals 50:

       • At index 1, self.lookup will contain {10: 0}.
       • At index 3 (value 40), it finds 50 - 40 = 10 in self.lookup, so it returns (0, 3), the indices of 10 and 40.
       • res1 = a.method(50)[0] assigns 0 (the first index of the result tuple) to res1.

     • In the second call, a.method(30) checks for two numbers in vals whose sum equals 30:

       • At index 1 (value 20), it finds 30 - 20 = 10 in self.lookup. So, it returns (0, 1), the indices of 10 and 20.
       • res2 = a.method(30)[1] assigns 1 (the second index of the result tuple) to res2.

4. Output:

   The resulting values are:

   • res1 = 0 (first index of the pair where the sum equals 50).
   • res2 = 1 (second index of the pair where the sum equals 30).

In summary, this code implements a two-sum functionality to find the indices of two numbers in a list that add up to a specific target.