Source code for grab.util.warning

import warnings
from functools import wraps
import logging
import traceback
import sys

DISABLE_WARNINGS = False


[docs]class GrabDeprecationWarning(UserWarning): """ Warning category used in Grab to generate warning messages. """
def warn(msg, stacklevel=2): warnings.warn(msg, category=GrabDeprecationWarning, stacklevel=stacklevel) frame = sys._getframe() # pylint: disable=protected-access logging.debug('Deprecation Warning\n' + ''.join(traceback.format_stack(f=frame.f_back))) # from https://github.com/scrapy/scrapy/blob/master/scrapy/utils/decorator.py def deprecated(use_instead=None): """This is a decorator which can be used to mark functions as deprecated. It will result in a warning being emitted when the function is used.""" def wrapped(func): @wraps(func) def new_func(*args, **kwargs): message = "Call to deprecated function %s." % func.__name__ if use_instead: message += " Use %s instead." % use_instead if not DISABLE_WARNINGS: warn(message, stacklevel=3) return func(*args, **kwargs) return new_func return wrapped