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atextcrawler is an asynchronous webcrawler indexing text for literal and semantic search.
Its client-side counterpart is atextsearch
atextcrawler crawls and indexes selected websites. It starts from a few seed sites and follows their external links. Criteria defined in plugin code determine which linked sites (and which of their resources) are (recursively) added to the pool.
atextcrawler is written in Python, runs a configurable number of async workers concurrently (in one process), uses tensorflow for embedding (paragraph-sized) text chunks in a (multi-)language model and stores metadata in PostgreSQL and texts in elasticsearch.