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typo [thanks Greg]

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Mark Pilgrim
2009-12-29 00:43:08 -05:00
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your-first-python-program.html
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@@ -63,7 +63,7 @@ if __name__ == '__main__':
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<p>What just happened? You executed your first Python program. You called the Python intepreter on the command line, and you passed the name of the script you wanted Python to execute. The script defines a single function, the <code>approximate_size()</code> function, which takes an exact file size in bytes and calculates a &#8220;pretty&#8221; (but approximate) size. (You&#8217;ve probably seen this in Windows Explorer, or the Mac OS X Finder, or Nautilus or Dolphin or Thunar on Linux. If you display a folder of documents as a multi-column list, it will display a table with the document icon, the document name, the size, type, last-modified date, and so on. If the folder contains a 1093-byte file named <code>TODO</code>, your file manager won&#8217;t display <code>TODO 1093 bytes</code>; it&#8217;ll say something like <code>TODO 1 KB</code> instead. That&#8217;s what the <code>approximate_size()</code> function does.)
<p>What just happened? You executed your first Python program. You called the Python interpreter on the command line, and you passed the name of the script you wanted Python to execute. The script defines a single function, the <code>approximate_size()</code> function, which takes an exact file size in bytes and calculates a &#8220;pretty&#8221; (but approximate) size. (You&#8217;ve probably seen this in Windows Explorer, or the Mac OS X Finder, or Nautilus or Dolphin or Thunar on Linux. If you display a folder of documents as a multi-column list, it will display a table with the document icon, the document name, the size, type, last-modified date, and so on. If the folder contains a 1093-byte file named <code>TODO</code>, your file manager won&#8217;t display <code>TODO 1093 bytes</code>; it&#8217;ll say something like <code>TODO 1 KB</code> instead. That&#8217;s what the <code>approximate_size()</code> function does.)
<p>Look at the bottom of the script, and you&#8217;ll see two calls to <code>print(approximate_size(<var>arguments</var>))</code>. These are function calls&nbsp;&mdash;&nbsp;first calling the <code>approximate_size()</code> function and passing a number of arguments, then taking the return value and passing it straight on to the <code>print()</code> function. The <code>print()</code> function is built-in; you&#8217;ll never see an explicit declaration of it. You can just use it, anytime, anywhere. (There are lots of built-in functions, and lots more functions that are separated into <i>modules</i>. Patience, grasshopper.)