Write the path that actually reaches each event.
Review matching exceptions, finally, instance attributes, successful context-manager entry and generator yields.
This count checks matching outcomes on six supplied CPython 3.14.5 tasks. It is not a developer band, percentile, employer threshold or qualification. Every worked answer and all four complete guides remain available at every count.
Read the declared success and failure paths
These tasks distinguish an exception raised while executing valid Python from the syntax failures in the function group. They also trace a finally block after a successful body, separate instance attributes, a context manager whose entry succeeds and a generator’s yielded numbers. Every output is deterministic for the supplied scripts. The examples do not open resources, send requests or ask you to infer what an unknown cleanup implementation would do.
A failed entry does not reach the shown exit method
For a new unscored example, a context manager’s __enter__ appends enter and then raises ValueError. Wrap the entire with statement in a matching try/except that appends handled. Give __exit__ a body that would append exit. The printed trace is enter:handled, without body or exit. The exit guarantee requires __enter__ to return successfully; if acquiring a resource fails partway through entry, the entry implementation must manage that failure appropriately.
Follow the actual exception class
The conversion task raises ValueError and has a matching handler. The separate lookup task raises KeyError and handles it through its base class LookupError. An except clause can match an exception class or its subclasses; names need not be identical. State whether execution reaches a handler before predicting its print. A handled runtime exception is not evidence that the surrounding script was syntactically invalid, and an unmatched exception would follow a different path.
Keep the cleanup conditions visible
In the bank’s finally item, the body succeeds and finally still appends its event. In the bank’s context-manager item, __enter__ returns successfully, the body runs and __exit__ then records exit. Those are distinct traces with explicit conditions. Do not broaden either into a claim that arbitrary setup failures are always cleaned up automatically, or that cleanup cannot itself raise. The provided code has no such hidden operations or suppressed exception.
Separate equal values from identity and yield from return
Two Cell constructor calls create two instances. Updating one instance’s own numeric attribute does not update the other, even when their resulting numbers match. The generator task is a separate distinction: sum consumes the values yielded before return ends iteration. The number written after return is not added as another yielded item. Read which operation requests each value instead of grouping every appearance of a number into one total.
Write an event trace before executing
In a disposable script with invented event labels, record entry, body, handler and exit as separate possible steps. Test a successful entry and a failing entry in separate runs, predicting which events can occur. For an instance or generator example, change only one supplied value before checking again. Run this optional revision in the stated interpreter after predicting; the website itself neither executes visitor code nor examines private files or real production errors.
Complete review without a professional label
The section counts six matching outcomes in one original fixed bank. It cannot show whether you can operate a service, debug resource leaks or design a complete exception policy. All explanations and guides are free after a valid full attempt, without a developer band, employer cutoff or certificate. English programs and outputs remain identical across the two interfaces. Reading the keys before retaking changes the practice conditions and can reward memory rather than unfamiliar-code reasoning.