def __init__(self, source, target, import_config, source_comments=None, source_attachments=None):
        super(CsvYouTrackImporter, self).__init__(source, target, import_config)
        self._after = 0
        self._comments = dict()
        self._attachments = dict()
        if source_comments:
            for c in source_comments.get_rows():
                issue_id = '%s-%s' % (c[0], c[1])
                if issue_id in self._comments:
                    self._comments[issue_id] = []
                self._comments[issue_id].append(c[2:])
        if source_attachments:
            for a in source_attachments.get_rows():
                issue_id = '%s-%s' % (a[0], a[1])
                if issue_id not in self._attachments:
                    self._attachments[issue_id] = []
                self._attachments[issue_id].append(a[2:])
dataset/ETHPy150Open JetBrains/youtrack-rest-python-library/python/csv2youtrack.py/CsvYouTrackImporter.__init__/operator `not in` -> `in`