aspectlib.debug¶
aspectlib.debug.log |
Decorates func to have logging. |
aspectlib.debug.format_stack |
Returns a one-line string with the current callstack. |
aspectlib.debug.frame_iterator |
Yields frames till there are no more. |
aspectlib.debug.strip_non_ascii |
Convert to string (using str) and replace non-ascii characters with a dot (. ). |
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aspectlib.debug.
format_stack
(skip=0, length=6, _sep='/')[source]¶ Returns a one-line string with the current callstack.
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aspectlib.debug.
log
(func=None, stacktrace=10, stacktrace_align=60, attributes=(), module=True, call=True, call_args=True, call_args_repr=<built-in function repr>, result=True, exception=True, exception_repr=<built-in function repr>, result_repr=<function strip_non_ascii>, use_logging='CRITICAL', print_to=None)[source]¶ Decorates func to have logging.
Parameters: - func (function) – Function to decorate. If missing log returns a partial which you can use as a decorator.
- stacktrace (int) – Number of frames to show.
- stacktrace_align (int) – Column to align the framelist to.
- attributes (list) – List of instance attributes to show, in case the function is a instance method.
- module (bool) – Show the module.
- call (bool) – If
True
, then show calls. IfFalse
only show the call details on exceptions (ifexception
is enabled) (default:True
) - call_args (bool) – If
True
, then show call arguments. (default:True
) - call_args_repr (bool) – Function to convert one argument to a string. (default:
repr
) - result (bool) – If
True
, then show result. (default:True
) - exception (bool) – If
True
, then show exceptions. (default:True
) - exception_repr (function) – Function to convert an exception to a string. (default:
repr
) - result_repr (function) – Function to convert the result object to a string. (default:
strip_non_ascii
- likestr
but nonascii characters are replaced with dots.) - use_logging (string) – Emit log messages with the given loglevel. (default:
"CRITICAL"
) - print_to (fileobject) – File object to write to, in case you don’t want to use logging module. (default:
None
- printing is disabled)
Returns: A decorator or a wrapper.
Example:
>>> @log(print_to=sys.stdout) ... def a(weird=False): ... if weird: ... raise RuntimeError('BOOM!') >>> a() a() <<< ... a => None >>> try: ... a(weird=True) ... except Exception: ... pass # naughty code ! a(weird=True) <<< ... a ~ raised RuntimeError('BOOM!',)
You can conveniently use this to logs just errors, or just results, example:
>>> import aspectlib >>> with aspectlib.weave(float, log(call=False, result=False, print_to=sys.stdout)): ... try: ... float('invalid') ... except Exception as e: ... pass # naughty code ! float('invalid') <<< ... float ~ raised ValueError(...float...invalid...)
This makes debugging naughty code easier.
PS: Without the weaving it looks like this:
>>> try: ... log(call=False, result=False, print_to=sys.stdout)(float)('invalid') ... except Exception: ... pass # naughty code ! float('invalid') <<< ... float ~ raised ValueError(...float...invalid...)
Changed in version 0.5.0: Renamed arguments to call_args. Renamed arguments_repr to call_args_repr. Added call option.