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

oops, broke table row highlighting

Browse Source
This commit is contained in:
Mark Pilgrim
2009-03-22 21:16:22 -04:00
parent b001e830bc
commit d7df09e509
2 changed files with 89 additions and 111 deletions
Download Patch File Download Diff File Expand all files Collapse all files
strings.html
+1 -1
View File
@@ -187,7 +187,7 @@ def approximate_size(size, a_kilobyte_is_1024_bytes=True):
<ul>
<li>The <code>sys</code> module holds information about the currently running Python instance. Since you just imported it, you can pass the <code>sys</code> module itself as an argument to the <code>format()</code> method. So the format specifier <code>{0}</code> refers to the <code>sys</code> module.
<li><code>sys.modules</code> is a dictionary of all the modules that have been imported in this Python instance. The keys are the module names as strings; the values are the module objects themselves. So the format specifier <code>{0.modules}</code> refers to the dictionary of imported modules.
<li><code>sys.modules["humansize"]</code> is the <code>humansize</code> module which you just imported. The format specifier <code>{0.modules[humansize]}</code> refers the <code>humansize</code> module. Note the slight difference in syntax here. In real Python code, the keys of the <code>sys.modules</code> dictionary are strings; to refer to them, you need to put quotes around the module name (<i>e.g.</i> <code>"humansize"</code>). But within a format specifier, you skip the quotes around the dictionary key name (<i>e.g.</i> <code>humansize</code>).
<li><code>sys.modules["humansize"]</code> is the <code>humansize</code> module which you just imported. The format specifier <code>{0.modules[humansize]}</code> refers to the <code>humansize</code> module. Note the slight difference in syntax here. In real Python code, the keys of the <code>sys.modules</code> dictionary are strings; to refer to them, you need to put quotes around the module name (<i>e.g.</i> <code>"humansize"</code>). But within a format specifier, you skip the quotes around the dictionary key name (<i>e.g.</i> <code>humansize</code>).
<li><code>sys.modules["humansize"].SUFFIXES</code> is the dictionary defined at the top of the <code>humansize</code> module. The format specifier <code>{0.modules[humansize].SUFFIXES}</code> refers to that dictionary.
<li><code>sys.modules["humansize"].SUFFIXES[1000]</code> is a list of <abbr>SI</abbr> suffixes: <code>['KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']</code>. So the format specifier <code>{0.modules[humansize].SUFFIXES[1000]}</code> refers to that list.
<lI><code>sys.modules["humansize"].SUFFIXES[1000][0]</code> is the first item of the list of <abbr>SI</abbr> suffixes: <code>'KB'</code>. Therefore, the complete format specifier <code>{0.modules[humansize].SUFFIXES[1000][0]}</code> is replaced by the two-character string <code>KB</code>.