python logging添加filter教程

Python  /  管理员 发布于 7年前   243

例子一

def filter(self, record):    """Our custom record filtering logic.    Built-in filtering logic (via logging.Filter) is too limiting.    """    if not self.filters:      return True    matched = False    rname = record.name # shortcut    for name in self.filters:      if rname == name or rname.startswith(name+'.'):        matched = True    return matched

例子二

def _create_log_handlers(stream):  """Create and return a default list of logging.Handler instances.  Format WARNING messages and above to display the logging level, and  messages strictly below WARNING not to display it.  Args:   stream: See the configure_logging() docstring.  """  # Handles logging.WARNING and above.  error_handler = logging.StreamHandler(stream)  error_handler.setLevel(logging.WARNING)  formatter = logging.Formatter("%(levelname)s: %(message)s")  error_handler.setFormatter(formatter)   # Create a logging.Filter instance that only accepts messages  # below WARNING (i.e. filters out anything WARNING or above).  non_error_filter = logging.Filter()  # The filter method accepts a logging.LogRecord instance.  non_error_filter.filter = lambda record: record.levelno < logging.WARNING   non_error_handler = logging.StreamHandler(stream)  non_error_handler.addFilter(non_error_filter)  formatter = logging.Formatter("%(message)s")  non_error_handler.setFormatter(formatter)   return [error_handler, non_error_handler]

例子三

def _default_handlers(stream):  """Return a list of the default logging handlers to use.  Args:   stream: See the configure_logging() docstring.  """  # Create the filter.  def should_log(record):    """Return whether a logging.LogRecord should be logged."""    # FIXME: Enable the logging of autoinstall messages once    #    autoinstall is adjusted. Currently, autoinstall logs    #    INFO messages when importing already-downloaded packages,    #    which is too verbose.    if record.name.startswith("webkitpy.thirdparty.autoinstall"):      return False    return True   logging_filter = logging.Filter()  logging_filter.filter = should_log   # Create the handler.  handler = logging.StreamHandler(stream)  formatter = logging.Formatter("%(name)s: [%(levelname)s] %(message)s")  handler.setFormatter(formatter)  handler.addFilter(logging_filter)   return [handler]

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