Will all one thousand asynchronous calls in Python be successful?

No, not all a thousand asynchronous calls in Python will necessarily succeed. Asynchrony allows multiple tasks to run in parallel, but the success of their execution depends on:

• The correctness of the code and exception handling within asynchronous functions.
• Resource limitations (for example, limits on the number of concurrent connections).
• External factors, such as the availability of network services.

If errors are not handled, some tasks may complete with exceptions. To control success, exception handling and result collection are usually used, for example, through asyncio.gather with the parameter return_exceptions=True.