try — Expert Playground

Starts a block of code that will be monitored for exceptions

Python Playground

import dis

def example():
    try:
        x = 1 / 0
    except ZeroDivisionError:
        return "caught"
    else:
        return "ok"
    finally:
        pass  # cleanup

dis.dis(example)

# Key bytecodes:
# SETUP_FINALLY - sets up the exception handler
# POP_EXCEPT - clears the exception state
# The finally block is duplicated in both paths

Output

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CPython uses SETUP_FINALLY to register exception handlers on an internal block stack. The finally block is compiled into both the normal and exception paths.

Challenge

Try modifying the code above to explore different behaviors. Can you extend the example to handle a new use case?

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