Challenge: Retry Decorator
You have now seen how decorators can enhance functions with additional behavior, such as logging, timing, or formatting. Sometimes, you may want to make your functions more robust by automatically retrying them when they fail due to exceptions. This is especially useful when dealing with unreliable operations, like network requests or file I/O, where a temporary glitch might cause a function to fail even though retrying would succeed. In this challenge, you will implement a decorator that retries a function up to three times if it raises an exception, and only gives up if all attempts fail.
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Write a decorator that retries a function up to three times if it raises an exception, then re-raises the exception if all attempts fail.
The decorator must:
- Attempt to call the decorated function.
- If the function raises an exception, catch it and retry up to two more times.
- If the function still raises an exception after three total attempts, re-raise the last exception.
- If the function succeeds on any attempt, return its result.
Рішення
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Can you show me how to implement the retry decorator?
What should the decorator do if the function keeps failing after three attempts?
Can you give an example of using this decorator with a function that might fail?
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Completion rate improved to 5.88Challenge: Retry Decorator
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You have now seen how decorators can enhance functions with additional behavior, such as logging, timing, or formatting. Sometimes, you may want to make your functions more robust by automatically retrying them when they fail due to exceptions. This is especially useful when dealing with unreliable operations, like network requests or file I/O, where a temporary glitch might cause a function to fail even though retrying would succeed. In this challenge, you will implement a decorator that retries a function up to three times if it raises an exception, and only gives up if all attempts fail.
Swipe to start coding
Write a decorator that retries a function up to three times if it raises an exception, then re-raises the exception if all attempts fail.
The decorator must:
- Attempt to call the decorated function.
- If the function raises an exception, catch it and retry up to two more times.
- If the function still raises an exception after three total attempts, re-raise the last exception.
- If the function succeeds on any attempt, return its result.
Рішення
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