i reading csv file pandas data frame. once data in data frame, building inverted index on based on rules. caching inverted index don't want build again , again performance point of view. if data changes in data frame, should able identify , create new inverted index. there way identify if data frame has changed or updated? looked @ at_time , between_time properties not sure if properties right use this.
in database/file system @ metadata - timestamp , identify if file updated or not. first python project , looking suggestions how can implement this.
