if compatibility with Python 2.7 is required). The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • Twisted recommended that you use a recent version of libcurl and pycurl. Currently the minimum supported version of libcurl is 7.22.0, and the minimum version of pycurl is 7.18.2. It is highly recommended that your libcurl in progress. • prepare_curl_callback (collections.abc.Callable) – If set, will be called with a pycurl.Curl object to allow the application to make additional setopt calls. • proxy_host (str) – HTTP

ThreadedResolver. It is needed only on Python 2; Python 3 includes this package in the standard library. • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • Twisted recommended that you use a recent version of libcurl and pycurl. Currently the minimum supported version of libcurl is 7.22.0, and the minimum version of pycurl is 7.18.2. It is highly recommended that your libcurl while the request is in progress. • prepare_curl_callback (callable) – If set, will be called with a pycurl.Curl object to allow the application to make additional setopt calls. • proxy_host (string) – HTTP

installed automatically by pip or setup.py install, the following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • Twisted recommended that you use a recent version of libcurl and pycurl. Currently the minimum supported version of libcurl is 7.22.0, and the minimum version of pycurl is 7.18.2. It is highly recommended that your libcurl in progress. • prepare_curl_callback (collections.abc.Callable) – If set, will be called with a pycurl.Curl object to allow the application to make additional setopt calls. • proxy_host (str) – HTTP

if compatibility with Python 2.7 is required). The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • Twisted recommended that you use a recent version of libcurl and pycurl. Currently the minimum supported version of libcurl is 7.22.0, and the minimum version of pycurl is 7.18.2. It is highly recommended that your libcurl in progress. • prepare_curl_callback (collections.abc.Callable) – If set, will be called with a pycurl.Curl object to allow the application to make additional setopt calls. • proxy_host (str) – HTTP

Prerequisites: Tornado 6.3 requires Python 3.8 or newer. The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares recommended that you use a recent version of libcurl and pycurl. Currently the minimum supported version of libcurl is 7.22.0, and the minimum version of pycurl is 7.18.2. It is highly recommended that your libcurl in progress. • prepare_curl_callback (collections.abc.Callable) – If set, will be called with a pycurl.Curl object to allow the application to make additional setopt calls. • proxy_host (str) – HTTP

Prerequisites: Tornado 6.2 requires Python 3.7 or newer. The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares recommended that you use a recent version of libcurl and pycurl. Currently the minimum supported version of libcurl is 7.22.0, and the minimum version of pycurl is 7.18.2. It is highly recommended that your libcurl in progress. • prepare_curl_callback (collections.abc.Callable) – If set, will be called with a pycurl.Curl object to allow the application to make additional setopt calls. • proxy_host (str) – HTTP

Prerequisites: Tornado 6.3 requires Python 3.8 or newer. The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares recommended that you use a recent version of libcurl and pycurl. Currently the minimum supported version of libcurl is 7.22.0, and the minimum version of pycurl is 7.18.2. It is highly recommended that your libcurl in progress. • prepare_curl_callback (collections.abc.Callable) – If set, will be called with a pycurl.Curl object to allow the application to make additional setopt calls. • proxy_host (str) – HTTP

Prerequisites: Tornado 6.3 requires Python 3.8 or newer. The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares recommended that you use a recent version of libcurl and pycurl. Currently the minimum supported version of libcurl is 7.22.0, and the minimum version of pycurl is 7.18.2. It is highly recommended that your libcurl in progress. • prepare_curl_callback (collections.abc.Callable) – If set, will be called with a pycurl.Curl object to allow the application to make additional setopt calls. • proxy_host (str) – HTTP

Prerequisites: Tornado 6.3 requires Python 3.8 or newer. The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares recommended that you use a recent version of libcurl and pycurl. Currently the minimum supported version of libcurl is 7.22.0, and the minimum version of pycurl is 7.18.2. It is highly recommended that your libcurl in progress. • prepare_curl_callback (collections.abc.Callable) – If set, will be called with a pycurl.Curl object to allow the application to make additional setopt calls. • proxy_host (str) – HTTP

Prerequisites: Tornado 6.3 requires Python 3.9 or newer. The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares recommended that you use a recent version of libcurl and pycurl. Currently the minimum supported version of libcurl is 7.22.0, and the minimum version of pycurl is 7.18.2. It is highly recommended that your libcurl in progress. • prepare_curl_callback (collections.abc.Callable) – If set, will be called with a pycurl.Curl object to allow the application to make additional setopt calls. • proxy_host (str) – HTTP