What is the default hierarchical method to catch exceptions in Python?

In Python, the default hierarchical method for catching exceptions follows the principle that exceptions are handled from the innermost block to the outermost block. When an exception is raised within a nested block of code, Python first looks for a corresponding exception handler (i.e., an except clause) in that innermost block. If it doesn't find one there, it propagates the exception to the next outer block or scope that encloses it. This continues until either an appropriate handler is found or the exception reaches the outermost level of the program, at which point if no handler is available, the program will terminate.

This method of handling exceptions allows for more granular control over error management, enabling developers to handle specific exceptions closer to where they occur, which can lead to more relevant responses to errors based on the context in which they happen.