Iterate through logs captured by nosetest's logcapture plugin

gistfile1.py

import logging
from nose.plugins import logcapture


def iter_captured_logs(pluck=None):
    handler = get_nose_log_handler()
    # need to call `format` in order to let it compose the `message` attr for us
    format = handler.format
    for r in handler.buffer:
        format(r)
        kv = r.__dict__
        yield kv.get(pluck) if pluck else kv


def get_nose_log_handler():
    root_logger = logging.getLogger()
    try:
        return next(handler for handler in root_logger.handlers if isinstance(handler, logcapture.MyMemoryHandler))
    except StopIteration:
        raise Exception("nose's logcapture plugin must be enabled.")