When should recursive functions be used in Python?

Recursion functions can be used in the following scenarios:

1. Recursion functions work well to solve problems when they can be broken down into smaller similar problems.
2. The recursive function can easily implement solutions when the problems are solved using divide and conquer or dynamic programming strategies.
3. When the structure of the program aligns with the approach of solving problems recursively, recursive functions can reduce the complexity of the code.
4. Recursive functions can be used to traverse and manipulate tree structures, such as the preorder, inorder, and postorder traversal of binary trees.
5. Recursion functions can effectively solve certain mathematical problems such as the Fibonacci sequence and factorial.
6. Recursive functions are also very useful when dealing with problems such as depth-first search (DFS) in graphs.