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There are various ways to report errors associated with service design pattern in Python, but the most common and recommended way is to use built-in exception handling mechanisms.

1. Raise an exception: When a service design pattern encounters an error, it can raise an exception by using the raise statement. The exception can be one of the built-in Python exceptions or a custom exception defined by the service designer.

2. Try-Except blocks: Another way to handle errors is to use try-except blocks. This allows the service designer to try a block of code and if it encounters an error, the except block can handle it appropriately.

3. Logging: It is always recommended to log errors instead of just raising an exception. In logging, the errors are logged in a file, which can be used for debugging and maintaining a record of what went wrong.

4. Returning specific error codes: Sometimes, when the error is expected, the service designer can return specific error codes which the client can use to identify what went wrong.

Overall, the most important thing when reporting errors associated with service design pattern is to provide as much information as possible so that the error can be easily diagnosed and fixed.