class ExceptionTrap: (source)
A context manager that will catch certain exceptions and provide an indication they occurred. >>> with ExceptionTrap() as trap: ... raise Exception() >>> bool(trap) True >>> with ExceptionTrap() as trap: ... pass >>> bool(trap) False >>> with ExceptionTrap(ValueError) as trap: ... raise ValueError("1 + 1 is not 3") >>> bool(trap) True >>> trap.value ValueError('1 + 1 is not 3') >>> trap.tb <traceback object at ...> >>> with ExceptionTrap(ValueError) as trap: ... raise Exception() Traceback (most recent call last): ... Exception >>> bool(trap) False
| Method | __bool__ |
Undocumented |
| Method | __enter__ |
Undocumented |
| Method | __exit__ |
Undocumented |
| Method | __init__ |
Undocumented |
| Method | passes |
Wrap func and replace the result with the truth value of the trap (True if no exception). |
| Method | raises |
Wrap func and replace the result with the truth value of the trap (True if an exception occurred). |
| Instance Variable | exc |
Undocumented |
| Instance Variable | exceptions |
Undocumented |
| Property | tb |
Undocumented |
| Property | type |
Undocumented |
| Property | value |
Undocumented |
Wrap func and replace the result with the truth value of the trap (True if no exception). First, give the decorator an alias to support Python 3.8 Syntax. >>> passes = ExceptionTrap(ValueError).passes Now decorate a function that always fails. >>> @passes ... def fail(): ... raise ValueError('failed') >>> fail() False
Wrap func and replace the result with the truth value of the trap (True if an exception occurred). First, give the decorator an alias to support Python 3.8 Syntax. >>> raises = ExceptionTrap(ValueError).raises Now decorate a function that always fails. >>> @raises ... def fail(): ... raise ValueError('failed') >>> fail() True