~certify-web-dev/twisted/certify-trunk

 

<span class="py-src-comment"># this series of callbacks and errbacks will print &quot;Result: 12&quot;

</span><span class="py-src-variable">g</span> = <span class="py-src-variable">Getter</span>()

<span class="py-src-variable">d</span>.<span class="py-src-variable">addCallback</span>(<span class="py-src-variable">printData</span>)

<span class="py-src-variable">d</span>.<span class="py-src-variable">addErrback</span>(<span class="py-src-variable">printError</span>)

 

  otherDeferred.errback)</code></p></li></ul><h2>See also<a name="auto12"></a></h2><ol><li><a href="gendefer.html">Generating Deferreds</a>, an introduction to

writing asynchronous functions that return Deferreds.</li></ol><h2>Footnotes</h2><ol><li><a name="footnote-1"><span xmlns="http://www.w3.org/1999/xhtml" class="footnote">Unless of course a later callback starts a fresh error &mdash;

but as we've already noted, adding callbacks to a Deferred after its used in a