I think that the most probable scenario is, that API call to mark request as handled fails (some random glitch). This puts the queue in a weird state, where the request is not properly marked as ...

BasicCrawler calls fetch_next_request which under normal circumstances should fetch request within miliseconds, but sometimes can freeze and it can take tens of seconds. Create BeautifulSoup crawler ...

However, if you prefer to consume the API directly, we have also created a tutorial with step-by-step instructions. We hope these options, along with our API reference docs make onboarding a breeze ...

Abstract: API recommendation in real-time is challenging for dynamic languages like Python. Many existing API recommendation techniques are highly effective, but they mainly support static languages.