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Mark Pilgrim
2009-06-26 01:03:21 -04:00
parent b74d9cd3df
commit 46a634031c
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native-datatypes.html
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@@ -453,14 +453,14 @@ IndexError: pop from empty list</samp></pre>
<h3 id=creating-dictionaries>Creating A Dictionary</h3>
<p>Creating a dictionary is easy. The syntax is similar to <a href=#sets>sets</a> [FIXME link fails because section is not written yet], but instead of values, you have key-value pairs. Once you have a dictionary, you can look up values by their key.
<pre class=screen>
<a><samp class=p>>>> </samp><kbd class=pp>a_dict = {'server':'db.diveintopython3.org', 'database':'mysql'}</kbd> <span class=u>&#x2460;</span></a>
<a><samp class=p>>>> </samp><kbd class=pp>a_dict = {'server': 'db.diveintopython3.org', 'database': 'mysql'}</kbd> <span class=u>&#x2460;</span></a>
<samp class=p>>>> </samp><kbd class=pp>a_dict</kbd>
<samp class=pp>{'server': 'db.diveintopython3.org', 'database': 'mysql'}</samp>
<a><samp class=p>>>> </samp><kbd class=pp>a_dict['server']</kbd> <span class=u>&#x2461;</span></a>
<a><samp class=p>>>> </samp><kbd class=pp>a_dict['server']</kbd> <span class=u>&#x2461;</span></a>
'db.diveintopython3.org'
<a><samp class=p>>>> </samp><kbd class=pp>a_dict['database']</kbd> <span class=u>&#x2462;</span></a>
<a><samp class=p>>>> </samp><kbd class=pp>a_dict['database']</kbd> <span class=u>&#x2462;</span></a>
'mysql'
<a><samp class=p>>>> </samp><kbd class=pp>a_dict['db.diveintopython3.org']</kbd> <span class=u>&#x2463;</span></a>
<a><samp class=p>>>> </samp><kbd class=pp>a_dict['db.diveintopython3.org']</kbd> <span class=u>&#x2463;</span></a>
<samp class=traceback>Traceback (most recent call last):
File "&lt;stdin>", line 1, in &lt;module>
KeyError: 'db.diveintopython3.org'</samp></pre>