General decorator to wrap try except in python?

General decorator to wrap try except in python?

You can create a general decorator in Python to wrap a try-except block around a function. This decorator can catch exceptions raised by the wrapped function and handle them in a consistent way. Here's an example of a general decorator for error handling:

def error_handler(default_return_value=None): def decorator(func): def wrapper(*args, **kwargs): try: result = func(*args, **kwargs) return result except Exception as e: # Handle the exception here print(f"An error occurred: {e}") return default_return_value return wrapper return decorator # Usage of the decorator @error_handler(default_return_value="Error occurred") def divide(a, b): return a / b result = divide(5, 0) print("Result:", result)

In this example:

  • The error_handler decorator takes an optional default_return_value parameter, which is the value returned in case of an exception.

  • The decorator function within the decorator pattern is responsible for wrapping the original function (func) with the try-except block.

  • The wrapper function inside the decorator function is the actual wrapper function that calls the original function and handles any exceptions that occur.

  • If an exception occurs inside the wrapped function, it's caught and handled in the except block. You can customize the exception handling logic as needed.

  • The decorator is applied to the divide function, which performs division. If a division by zero error occurs, the default return value ("Error occurred" in this case) is returned.

  • When you call divide(5, 0), it catches the exception and returns the default value, resulting in "Result: Error occurred" being printed.

You can use this general decorator to handle exceptions in a consistent manner for multiple functions by applying it as a decorator to those functions.

Examples

  1. "Python general decorator for try-except blocks" Description: This query seeks a general decorator in Python that can wrap functions with try-except blocks to handle exceptions gracefully. Code:

    def try_except_decorator(func): def wrapper(*args, **kwargs): try: return func(*args, **kwargs) except Exception as e: print(f"An exception occurred: {e}") # Additional exception handling code can be added here return wrapper @try_except_decorator def example_function(): # Code that may raise exceptions pass

  2. "Python decorator for handling exceptions" Description: This query looks for a Python decorator specifically designed to wrap functions with try-except blocks for exception handling purposes. Code:

    def exception_handler(func): def wrapper(*args, **kwargs): try: return func(*args, **kwargs) except Exception as e: print(f"Exception occurred: {e}") # Additional exception handling code can be added here return wrapper @exception_handler def example_function(): # Code that may raise exceptions pass

  3. "Python decorator to catch exceptions" Description: This query aims to find a Python decorator that catches exceptions raised within decorated functions and handles them appropriately. Code:

    def catch_exceptions(func): def wrapper(*args, **kwargs): try: return func(*args, **kwargs) except Exception as e: print(f"Caught exception: {e}") # Additional exception handling code can be added here return wrapper @catch_exceptions def example_function(): # Code that may raise exceptions pass

  4. "Python decorator for try-except blocks" Description: This query searches for a Python decorator that can automatically wrap functions with try-except blocks to handle exceptions. Code:

    def try_except_decorator(func): def wrapper(*args, **kwargs): try: return func(*args, **kwargs) except Exception as e: print(f"Exception caught: {e}") # Additional exception handling code can be added here return wrapper @try_except_decorator def example_function(): # Code that may raise exceptions pass

  5. "General Python decorator for exception handling" Description: This query is about finding a general-purpose Python decorator suitable for wrapping functions with try-except blocks to manage exceptions. Code:

    def handle_exceptions(func): def wrapper(*args, **kwargs): try: return func(*args, **kwargs) except Exception as e: print(f"An exception occurred: {e}") # Additional exception handling code can be added here return wrapper @handle_exceptions def example_function(): # Code that may raise exceptions pass

  6. "Python decorator to wrap functions with try-catch" Description: This query seeks a Python decorator capable of wrapping functions with try-catch blocks to catch and handle exceptions. Code:

    def try_catch_decorator(func): def wrapper(*args, **kwargs): try: return func(*args, **kwargs) except Exception as e: print(f"Caught exception: {e}") # Additional exception handling code can be added here return wrapper @try_catch_decorator def example_function(): # Code that may raise exceptions pass

  7. "Python decorator to handle errors" Description: This query is looking for a Python decorator designed to handle errors gracefully by wrapping functions with try-except blocks. Code:

    def error_handler(func): def wrapper(*args, **kwargs): try: return func(*args, **kwargs) except Exception as e: print(f"Error occurred: {e}") # Additional exception handling code can be added here return wrapper @error_handler def example_function(): # Code that may raise exceptions pass

  8. "Python decorator for try-except blocks with logging" Description: This query aims to find a Python decorator capable of wrapping functions with try-except blocks and logging any encountered exceptions. Code:

    import logging def try_except_with_logging(func): def wrapper(*args, **kwargs): try: return func(*args, **kwargs) except Exception as e: logging.error(f"Exception occurred: {e}") # Additional exception handling code can be added here return wrapper @try_except_with_logging def example_function(): # Code that may raise exceptions pass

  9. "Python decorator for catching and handling exceptions" Description: This query is about finding a Python decorator capable of catching and handling exceptions raised within functions it decorates. Code:

    def catch_and_handle_exceptions(func): def wrapper(*args, **kwargs): try: return func(*args, **kwargs) except Exception as e: print(f"Caught and handled exception: {e}") # Additional exception handling code can be added here return wrapper @catch_and_handle_exceptions def example_function(): # Code that may raise exceptions pass

  10. "Python decorator for try-except blocks with custom error handling" Description: This query looks for a Python decorator capable of wrapping functions with try-except blocks and providing custom error handling for encountered exceptions. Code:

    def try_except_custom_handler(handler_func): def decorator(func): def wrapper(*args, **kwargs): try: return func(*args, **kwargs) except Exception as e: handler_func(e) # Additional exception handling code can be added here return wrapper return decorator def custom_error_handler(exception): print(f"Custom error handler triggered: {exception}") @try_except_custom_handler(custom_error_handler) def example_function(): # Code that may raise exceptions pass

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