### Python Code: Tree Data StructureThis section presents a Python implementation of a simple tree data structure. The code defines a `Tree` class with methods for initialization, representation, and string conversion.```pythonclass Tree: def __init__(self, value, branches=()): self.value = value for branch in branches: assert isinstance(branch, Tree) self.branches = list(branches) def __repr__(self): if self.branches: branches_str = ', ' + repr(self.branches) else: branches_str = '' return 'Tree({0}{1})'.format(self.value, branches_str) def __str__(self): def print_tree(t, indent=0): tree_str = ' ' * indent + str(t.value) + "\n" for b in t.branches: tree_str += print_tree(b, indent + 1) return tree_str```### Explanation- **Class Definition:** - `Tree`: Represents a tree node with a value and optional branches (children), initialized as an empty tuple by default.- **Initialization Method:** - `__init__(self, value, branches=())`: Initializes a tree node with a provided value and optional list of branches. It ensures all branches are instances of the `Tree` class.- **Representation Method:** - `__repr__(self)`: Returns a string representing the tree, displaying its value and branches.- **String Conversion Method:** - `__str__(self)`: Provides a formatted string representation of the tree, with each level of the tree indented for clarity.The `print_tree` function within the `__str__` method helps recursively construct a visual representation of the tree structure, enhancing readability and providing insights into the hierarchical relationships within the tree. **Question 3: Find Level**Implement `find_level`, which takes a tree `t` and an integer `level` and returns a list of all the values that have depth `level`. If no such values exist, return the empty list. For a refresher on the depth of a node, check out [here](#).```pythondef find_level(t, level): """ >>> t = Tree(1, [Tree(2, [Tree(4), Tree(5)]), Tree(6, [Tree(7)])]) >>> find_level(t, 2) [4, 5, 7] >>> find_level(t, 1) [2, 6] >>> find_level(t, 5) [] """ "*** YOUR CODE HERE ***"```In this section, you are tasked with completing the function `find_level` to identify elements at a specific depth in a tree data structure. The examples show how the function should behave given a tree and a specified depth level.

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Implement find_level, which takes a tree t and an integer level and returns a list of all the values that have depth level. If no such values exist, return the empty list. For a refresher on the depth of a node, check out here.

Implement find_level, which takes a tree t and an integer level and returns a list of all the values that have depth level. If no such values exist, return the empty list. For a refresher on the depth of a node, check out here.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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