monotonic clock if available (see below for more details). Backwards-incompatible changes • Python 2.5 is no longer supported. Python 3 is now supported in a single codebase instead of using 2to3 • The simple_httpclient correctly verifies SSL certificates for URLs containing IPv6 literals (This bug affected Python 2.5 and 2.6). • tornado.simple_httpclient no longer includes basic auth credentials in the Host header configure("tornado.curl_httpclient.CurlAsyncHTTPClient") at the beginning of the process. Users of Python 2.5 will probably want to use curl_httpclient as simple_httpclient only supports ssl on Python 2.6+. *

monotonic clock if available (see below for more details). Backwards-incompatible changes Python 2.5 is no longer supported. Python 3 is now supported in a single codebase instead of using 2to3 The tornado simple_httpclient correctly verifies SSL certificates for URLs containing IPv6 literals (This bug affected Python 2.5 and 2.6). tornado.simple_httpclient no longer includes basic auth credentials in the Host header when configure("tornado.curl_httpclient.CurlAsyncHTTPClient" ) at the beginning of the process. Users of Python 2.5 will probably want to use curl_httpclient as simple_httpclient only supports ssl on Python 2