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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def process_paths(options, candidates=None, error=True):
 """Process files and log errors."""

    errors = check_path(options, rootdir=CURDIR, candidates=candidates)

    if options.format in ['pycodestyle', 'pep8']:
        pattern = "%(filename)s:%(lnum)s:%(col)s: %(text)s"
    elif options.format == 'pylint':
        pattern = "%(filename)s:%(lnum)s: [%(type)s] %(text)s"
    else:  # 'parsable'
        pattern = "%(filename)s:%(lnum)s:%(col)s: [%(type)s] %(text)s"

    for er in errors:
        if options.abspath:
            er._info['filename'] = op.abspath(er.filename)
        LOGGER.warning(pattern, er._info)

    if error:
        sys.exit(int(bool(errors)))

    return errors