kennethreitz/dive-into-python3
1
0
Fork 0
mirror of https://github.com/kennethreitz/dive-into-python3.git synced 2026-06-05 23:10:17 +00:00
Code Issues Packages Projects Releases Wiki Activity

xref

Browse Source
This commit is contained in:
Mark Pilgrim
2009-07-16 23:28:06 -04:00
parent ca7233328d
commit e5fc05e9b0
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
advanced-iterators.html
+1 -1
View File
@@ -205,7 +205,7 @@ AssertionError: Only for very large values of 2</samp></pre>
<a><samp class=p>>>> </samp><kbd class=pp>tuple(ord(c) for c in unique_characters)</kbd> <span class=u>&#x2463;</span></a>
<samp class=pp>(69, 68, 77, 79, 78, 83, 82, 89)</samp></pre>
<ol>
<li>A generator expression is like an anonymous function that yields values. The expression itself looks like a list comprehension [FIXME have we introduced this yet?], but it&#8217;s wrapped in parentheses instead of square brackets.
<li>A generator expression is like an anonymous function that yields values. The expression itself looks like a list comprehension [FIXME xref], but it&#8217;s wrapped in parentheses instead of square brackets.
<li>The generator expression returns&hellip; an iterator.
<li>Calling <code>next(<var>gen</var>)</code> returns the next value from the iterator.
<li>If you like, you can iterate through all the possible values and return a tuple, list, or set, by passing the generator expression to <code>tuple()</code>, <code>list()</code>, or <code>set()</code>. In these cases, you don&#8217;t need an extra set of parentheses&nbsp;&mdash;&nbsp;just pass the &#8220;bare&#8221; expression <code>ord(c) for c in unique_characters</code> to the <code>tuple()</code> function, and Python figures out that it&#8217;s a generator expression.