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

typo in strings chapter [h/t AVK]

Browse Source
This commit is contained in:
Mark Pilgrim
2009-03-27 09:22:29 -05:00
parent 933dc9459a
commit 632f16ea4a
2 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
iterators-and-generators.html
+1 -1
View File
@@ -11,7 +11,7 @@ body{counter-reset:h1 11}
<p>You are here: <a href=index.html>Home</a> <span>&#8227;</span> <a href=table-of-contents.html#iterators-and-generators>Dive Into Python 3</a> <span>&#8227;</span>
<h1>Iterators <i class=baa>&amp;</i> Generators</h1>
<blockquote class=q>
<p><span>&#x275D;</span> East is East, and West is West, and never the twain shall meet. <span>&#x275E;</span><br>&mdash; <a href=http://en.wikiquote.org/wiki/Rudyard_Kipling>Rudyard_Kipling</a>
<p><span>&#x275D;</span> East is East, and West is West, and never the twain shall meet. <span>&#x275E;</span><br>&mdash; <a href=http://en.wikiquote.org/wiki/Rudyard_Kipling>Rudyard Kipling</a>
</blockquote>
<p id=toc>&nbsp;
<h2 id=divingin>Diving in</h2>
strings.html
+1 -1
View File
@@ -163,7 +163,7 @@ def approximate_size(size, a_kilobyte_is_1024_bytes=True):
</pre>
<ol>
<li>Rather than calling any function in the <code>humansize</code> module, you're just grabbing one of the data structures it defines: the list of "SI" (powers-of-1000) suffixes.
<li>This looks complicated, but it's not. <code>{0}</code> would refer to the first argument passed to the <code>format()</code> method, <var>si_suffixes</var>. But <var>si_suffixes</var> is a list. So <code>{0[0]}</code> refers to the first item of the list which is the first argument passed to the <code>format()</code> method: <code>'KB'</code>. Meanwhile, <code>{1[0]}</code> refers to the second item of the same list: <code>'MB'</code>. Everything outside the curly braces &mdash; including <code>1000</code>, the equals sign, and the spaces &mdash; is untouched. The final result is the string <code>'1000KB = 1MB'</code>.
<li>This looks complicated, but it's not. <code>{0}</code> would refer to the first argument passed to the <code>format()</code> method, <var>si_suffixes</var>. But <var>si_suffixes</var> is a list. So <code>{0[0]}</code> refers to the first item of the list which is the first argument passed to the <code>format()</code> method: <code>'KB'</code>. Meanwhile, <code>{0[1]}</code> refers to the second item of the same list: <code>'MB'</code>. Everything outside the curly braces &mdash; including <code>1000</code>, the equals sign, and the spaces &mdash; is untouched. The final result is the string <code>'1000KB = 1MB'</code>.
</ol>
<p>What this example shows is that <em>format specifers can access items and properties of data structures using (almost) Python syntax</em>. This is called <i>compound field names</i>. The following compound field names "just work":