def from_crawler(cls, crawler):
api_key = crawler.settings.get(ALCHEMY_API_KEY)
tags_file = crawler.settings.get(TAGS_FILE)
tag_match_threshold = crawler.settings.getint(TAG_MATCH_THRESHOLD, default=None)
relevance_threshold = crawler.settings.getfloat(RELEVANCE_THRESHOLD, default=None)
case_insensitive_tags = crawler.settings.getbool(CASE_INSENSITIVE_TAGS, default=None)
preconditions.check_not_none_or_whitespace(api_key, ALCHEMY_API_KEY, exception=BoSettingsError)
preconditions.check_not_none_or_whitespace(tags_file, TAGS_FILE, exception=BoSettingsError)
preconditions.check_not_none(tag_match_threshold, TAG_MATCH_THRESHOLD, exception=BoSettingsError)
preconditions.check_not_none(relevance_threshold, RELEVANCE_THRESHOLD, exception=BoSettingsError)
preconditions.check_not_none(case_insensitive_tags, CASE_INSENSITIVE_TAGS, exception=BoSettingsError)
return cls(api_key, tags_file, tag_match_threshold, case_insensitive_tags, relevance_threshold)
def __init__(self, inner_extractor, child_to_parent_map):
self.inner_extractor = check_not_none(inner_extractor, 'inner_extractor')
self.child_to_parent_map = check_not_none(child_to_parent_map, child_to_parent_map)
