twisted.python.failure

module documentation
(source)

Asynchronous-friendly error mechanism.

See Failure.

Exception DefaultException Undocumented
Exception Failure A basic abstraction for an error that has occurred.
Exception NoCurrentExceptionError Raised when trying to create a Failure from the current interpreter exception state and there is no current exception state.
Function format_frames Format and write frames.
Function startDebugMode Enable debug hooks for Failures.
Constant DO_POST_MORTEM Undocumented
Constant EXCEPTION_CAUGHT_HERE Undocumented
Variable count Undocumented
Variable traceupLength Undocumented
Class _Code A fake code object, used by _Traceback via _Frame.
Class _Frame A fake frame object, used by _Traceback.
Class _TracebackFrame Fake traceback object which can be passed to functions in the standard library traceback module.
Function _debuginit Initialize failure object, possibly spawning pdb.
Function _extraneous Mark the given callable as extraneous to inlineCallbacks exception reporting; don't show these functions.
Function _safeReprVars Convert a list of (name, object) pairs into (name, repr) pairs.
Function _Traceback Construct a fake traceback object using a list of frames.
Type Variable _T_Callable Undocumented
Variable _inlineCallbacksExtraneous Undocumented
def format_frames(frames, write, detail='default'): (source)

Format and write frames.

Parameters
frames:listis a list of frames as used by Failure.frames, with each frame being a list of (funcName, fileName, lineNumber, locals.items(), globals.items())
write:callablethis will be called with formatted strings.
detail:stringFour detail levels are available: default, brief, verbose, and verbose-vars-not-captured. Failure.printDetailedTraceback uses the latter when the caller asks for verbose, but no vars were captured, so that an explicit warning about the missing data is shown.
def startDebugMode(): (source)

Enable debug hooks for Failures.

DO_POST_MORTEM: bool = (source)

Undocumented

Value
True
EXCEPTION_CAUGHT_HERE: str = (source)

Undocumented

Value
'--- <exception caught here> ---'
count: int = (source)

Undocumented

traceupLength: int = (source)

Undocumented

def _debuginit(self, exc_value=None, exc_type=None, exc_tb=None, captureVars=False, Failure__init__=Failure.__init__): (source)

Initialize failure object, possibly spawning pdb.

def _extraneous(f: _T_Callable) -> _T_Callable: (source)

Mark the given callable as extraneous to inlineCallbacks exception reporting; don't show these functions.

Parameters
f:functiona function that you NEVER WANT TO SEE AGAIN in ANY TRACEBACK reported by Failure.
Returns
_T_Callablef
def _safeReprVars(varsDictItems): (source)

Convert a list of (name, object) pairs into (name, repr) pairs.

twisted.python.reflect.safe_repr is used to generate the repr, so no exceptions will be raised by faulty __repr__ methods.

Parameters
varsDictItemsa sequence of (name, value) pairs as returned by e.g. locals().items().
Returns
a sequence of (name, repr) pairs.
def _Traceback(tbFrames): (source)

Construct a fake traceback object using a list of frames.

It should have the same API as stdlib to allow interaction with other tools.

Parameters
tbFrames[(methodname, filename, lineno, locals, globals), ...]
_T_Callable = (source)

Undocumented

Value
TypeVar('_T_Callable',
        bound=Callable[..., object])
_inlineCallbacksExtraneous: list = (source)

Undocumented