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Changeset 345

Timestamp:

06/21/08 21:57:45 (4 years ago)

Author:

simon

Message:

Slides used in talk.

Location:

hodgestar/Talks/PythonObjects/html

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hodgestar/Talks/PythonObjects/html/pyobjects-0.html

r340	r345
1	1	<html>
2	2	<head>
3		<title>Everything You Didn't Want to Know~~n A~~bout Python Objects</title>
	3	<title>Everything You Didn't Want to Know about Python Objects</title>
4	4	<link rel="stylesheet" type="text/css" href="main.css" />
5	5	<link rel="stylesheet" type="text/css" href="pygment.css" />
6	6	</head>
7	7	<body>
8		<h2>Everything You Didn't Want to Know~~n A~~bout Python Objects</h2>
	8	<h2>Everything You Didn't Want to Know about Python Objects</h2>
9	9	<ol>
10		<li><a href='pyobjects-1.html'>Everything You Didn't Want to Know~~n A~~bout Python Objects</a></li>
	10	<li><a href='pyobjects-1.html'>Everything You Didn't Want to Know about Python Objects</a></li>
11	11	<li><a href='pyobjects-2.html'>Out With The Old ...</a></li>
12	12	<li><a href='pyobjects-3.html'>Gambolling With Slots</a></li>
13		<li><a href='pyobjects-4.html'>Strings</a></li>
14		<li><a href='pyobjects-5.html'>Find Big Dict</a></li>
15		<li><a href='pyobjects-6.html'>Ints</a></li>
16		<li><a href='pyobjects-7.html'>Int (speed)</a></li>
17		<li><a href='pyobjects-8.html'>Floats</a></li>
18		<li><a href='pyobjects-9.html'>PyObject C API</a></li>
19		<li><a href='pyobjects-10.html'>object.c</a></li>
20		<li><a href='pyobjects-11.html'>New Python Documents - ZOMG!</a></li>
	13	<li><a href='pyobjects-4.html'>object.c</a></li>
	14	<li><a href='pyobjects-5.html'>Strings</a></li>
	15	<li><a href='pyobjects-6.html'>Find Big Dict</a></li>
	16	<li><a href='pyobjects-7.html'>Ints</a></li>
	17	<li><a href='pyobjects-8.html'>Int (speed)</a></li>
	18	<li><a href='pyobjects-9.html'>Floats</a></li>
	19	<li><a href='pyobjects-10.html'>C API Documentation</a></li>
21	20	</ol>
22	21	<br /></body></html>

hodgestar/Talks/PythonObjects/html/pyobjects-1.html

r330	r345
1	1	<html>
2	2	<head>
3		<title>Everything You Didn't Want to Know~~n A~~bout Python Objects</title>
	3	<title>Everything You Didn't Want to Know about Python Objects</title>
4	4	<link rel="stylesheet" type="text/css" href="main.css" />
5	5	<link rel="stylesheet" type="text/css" href="pygment.css" />
6	6	</head>
7	7	<body>
8		Prev \| <a href="pyobjects-0.html">Index</a> \| <a acesskey="N" href="pyobjects-2.html">Next</a><h1><center>Everything You Didn't Want to Known About Python Objects</center></h1><center><li>in which I chronicle my recent findings in the depths of Object/object.c</li>
9		</center><br /><div class="footer"><hr />Everything You Didn't Want to Known About Python Objects</div></body></html>
	8	<div style='margin: auto; width: 50%;'><h1>Everything You Didn't Want to Know about Python Objects</h1><ul style='list-style-type: none;'>
	9	<li>in which I chronicle my recent findings in the depths of Object/object.c</li>
	10	</ul>
	11	</div>Prev \| <a href="pyobjects-0.html">Index</a> \| <a accesskey="K" href="pyobjects-2.html">Next</a><br /><div class="footer" style="font-style: italic;"><hr />Everything You Didn't Want to Know about Python Objects</div></body></html>

hodgestar/Talks/PythonObjects/html/pyobjects-10.html

r340	r345
1	1	<html>
2	2	<head>
3		<title>Everything You Didn't Want to Know~~n A~~bout Python Objects</title>
	3	<title>Everything You Didn't Want to Know about Python Objects</title>
4	4	<link rel="stylesheet" type="text/css" href="main.css" />
5	5	<link rel="stylesheet" type="text/css" href="pygment.css" />
6	6	</head>
7	7	<body>
8		<a accesskey="P" href="pyobjects-9.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a acesskey="N" href="pyobjects-11.html">Next</a><div style='margin: auto; width: 50%;'><h2>object.c</h2><ul>
9		<li><img src='tabs.png' alt='' /></li>
	8	<div style='margin: auto; width: 50%;'><h2>C API Documentation</h2><ul>
	9	<li>PyObject API:<ul><li>List of methods unchanged between 2.5, 2.6 and 3.0</li>
	10	</ul></li>
	11
	12	<li>New documentation!<ul><li>Interactive search -- in static HTML</li>
	13
	14	<li>JSON index</li>
	15
	16	<li><a href="file:///home/simon/LocalProjects/PythonSpint/trunk/Doc/build/html/index.html">2.6 Docs</a></li>
	17	</ul></li>
10	18	</ul>
11		</div><~~br /><div class="footer"><hr />Everything You Didn't Want to Known A~~bout Python Objects</div></body></html>
	19	</div><a accesskey="J" href="pyobjects-9.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| Next<br /><div class="footer" style="font-style: italic;"><hr />Everything You Didn't Want to Know about Python Objects</div></body></html>

hodgestar/Talks/PythonObjects/html/pyobjects-2.html

r340	r345
1	1	<html>
2	2	<head>
3		<title>Everything You Didn't Want to Know~~n A~~bout Python Objects</title>
	3	<title>Everything You Didn't Want to Know about Python Objects</title>
4	4	<link rel="stylesheet" type="text/css" href="main.css" />
5	5	<link rel="stylesheet" type="text/css" href="pygment.css" />
6	6	</head>
7	7	<body>
8		<~~a accesskey="P" href="pyobjects-1.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a acesskey="N" href="pyobjects-3.html">Next</a><~~div style='margin: auto; width: 50%;'><h2>Out With The Old ...</h2><ul>
	8	<div style='margin: auto; width: 50%;'><h2>Out With The Old ...</h2><ul>
9	9	<li>Old style:<div class="highlight"><pre><span class="gp">>>> </span><span class="k">class</span> <span class="nc">Old</span><span class="p">:</span>
10	10	<span class="gp">... </span> <span class="k">pass</span>
…	…
12	12	<span class="gp">>>> </span><span class="nb">type</span><span class="p">(</span><span class="n">Old</span><span class="p">),</span> <span class="nb">type</span><span class="p">(</span><span class="n">Old</span><span class="p">())</span>
13	13	<span class="go">(<type 'classobj'>, <type 'instance'>)</span>
	14	<span class="gp">>>> </span><span class="n">Old</span><span class="o">.</span><span class="n">__class__</span>
	15	<span class="gt">Traceback (most recent call last):</span>
	16	File <span class="nb">"<stdin>"</span>, line <span class="m">1</span>, in <span class="n-Identifier"><module></span>
	17	<span class="nc">AttributeError</span>: <span class="n-Identifier">class Old has no attribute '__class__'</span>
	18	<span class="gp">>>> </span><span class="n">Old</span><span class="p">()</span><span class="o">.</span><span class="n">__class__</span>
	19	<span class="go"><class util.Old at 0xb7d4e62c></span>
14	20	</pre></div>
15	21	</li>
…	…
20	26	<span class="gp">>>> </span><span class="nb">type</span><span class="p">(</span><span class="n">New</span><span class="p">),</span> <span class="nb">type</span><span class="p">(</span><span class="n">New</span><span class="p">())</span>
21	27	<span class="go">(<type 'type'>, <class '__main__.New'>)</span>
	28	<span class="gp">>>> </span><span class="n">New</span><span class="o">.</span><span class="n">__class__</span>
	29	<span class="go"><type 'type'></span>
	30	<span class="gp">>>> </span><span class="n">New</span><span class="p">()</span><span class="o">.</span><span class="n">__class__</span>
	31	<span class="go"><class 'util.New'></span>
22	32	</pre></div>
23	33	</li>
	34
	35	<li>Old + __metaclass__ == New</li>
24	36	</ul>
25		</div><~~br /><div class="footer"><hr />Everything You Didn't Want to Known A~~bout Python Objects</div></body></html>
	37	</div><a accesskey="J" href="pyobjects-1.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a accesskey="K" href="pyobjects-3.html">Next</a><br /><div class="footer" style="font-style: italic;"><hr />Everything You Didn't Want to Know about Python Objects</div></body></html>

hodgestar/Talks/PythonObjects/html/pyobjects-3.html

r340	r345
1	1	<html>
2	2	<head>
3		<title>Everything You Didn't Want to Know~~n A~~bout Python Objects</title>
	3	<title>Everything You Didn't Want to Know about Python Objects</title>
4	4	<link rel="stylesheet" type="text/css" href="main.css" />
5	5	<link rel="stylesheet" type="text/css" href="pygment.css" />
6	6	</head>
7	7	<body>
8		<a accesskey="P" href="pyobjects-2.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a acesskey="N" href="pyobjects-4.html">Next</a><div style='margin: auto; width: 50%;'><h2>Gambolling With Slots</h2><ul>
	8	<div style='margin: auto; width: 50%;'><h2>Gambolling With Slots</h2><ul>
	9	<li>Adding slots:<div class="highlight"><pre><span class="gp">>>> </span><span class="k">class</span> <span class="nc">FooBar</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
	10	<span class="gp">... </span> <span class="k">def</span> <span class="nf">__str__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
	11	<span class="gp">... </span> <span class="k">return</span> <span class="s">"foobar"</span>
	12	<span class="gp">...</span>
	13	<span class="gp">>>> </span> <span class="k">def</span> <span class="nf">__unicode__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
	14	<span class="gp">... </span> <span class="k">return</span> <span class="nb">unicode</span><span class="p">(</span><span class="s">"foobar"</span><span class="p">)</span>
	15	<span class="gp">...</span>
	16	<span class="gp">>>> </span><span class="nb">str</span><span class="p">(</span><span class="n">FuBar</span><span class="p">),</span> <span class="nb">str</span><span class="p">(</span><span class="n">FuBar</span><span class="p">())</span>
	17	<span class="go">("<class 'util.FuBar'>", 'fubar')</span>
	18	<span class="gp">>>> </span><span class="nb">unicode</span><span class="p">(</span><span class="n">FuBar</span><span class="p">)</span>
	19	<span class="gt">Traceback (most recent call last):</span>
	20	File <span class="nb">"<stdin>"</span>, line <span class="m">1</span>, in <span class="n-Identifier"><module></span>
	21	<span class="nc">TypeError</span>: <span class="n-Identifier">unbound method __unicode__() must be called with FuBar instance as first argument (got nothing instead)</span>
	22	<span class="gp">>>> </span><span class="nb">unicode</span><span class="p">(</span><span class="n">Uni</span><span class="p">())</span>
	23	<span class="go">u'fubar'</span>
	24	</pre></div>
	25	</li>
	26
	27	<li>Same thing happens with old-style classes.</li>
9	28	</ul>
10		</div><~~br /><div class="footer"><hr />Everything You Didn't Want to Known A~~bout Python Objects</div></body></html>
	29	</div><a accesskey="J" href="pyobjects-2.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a accesskey="K" href="pyobjects-4.html">Next</a><br /><div class="footer" style="font-style: italic;"><hr />Everything You Didn't Want to Know about Python Objects</div></body></html>

hodgestar/Talks/PythonObjects/html/pyobjects-4.html

r340	r345
1	1	<html>
2	2	<head>
3		<title>Everything You Didn't Want to Know~~n A~~bout Python Objects</title>
	3	<title>Everything You Didn't Want to Know about Python Objects</title>
4	4	<link rel="stylesheet" type="text/css" href="main.css" />
5	5	<link rel="stylesheet" type="text/css" href="pygment.css" />
6	6	</head>
7	7	<body>
8		<a accesskey="P" href="pyobjects-3.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a acesskey="N" href="pyobjects-5.html">Next</a><div style='margin: auto; width: 50%;'><h2>Strings</h2><ul>
9		<li>Examples:<div class="highlight"><pre><span class="gp">>>> </span><span class="n">x</span> <span class="o">=</span> <span class="nb">chr</span><span class="p">(</span><span class="mf">13</span><span class="p">)</span>
10		<span class="gp">>>> </span><span class="n">y</span> <span class="o">=</span> <span class="nb">chr</span><span class="p">(</span><span class="mf">13</span><span class="p">)</span>
11		<span class="gp">>>> </span><span class="nb">id</span><span class="p">(</span><span class="n">x</span><span class="p">),</span> <span class="nb">id</span><span class="p">(</span><span class="n">y</span><span class="p">)</span>
12		<span class="go">(3082874688L, 3082874688L)</span>
13		<span class="gp">>>> </span><span class="n">x</span> <span class="o">=</span> <span class="nb">chr</span><span class="p">(</span><span class="mf">13</span><span class="p">)</span> <span class="o">+</span> <span class="nb">chr</span><span class="p">(</span><span class="mf">14</span><span class="p">)</span>
14		<span class="gp">>>> </span><span class="n">y</span> <span class="o">=</span> <span class="nb">chr</span><span class="p">(</span><span class="mf">13</span><span class="p">)</span> <span class="o">+</span> <span class="nb">chr</span><span class="p">(</span><span class="mf">14</span><span class="p">)</span>
15		<span class="gp">>>> </span><span class="nb">id</span><span class="p">(</span><span class="n">x</span><span class="p">),</span> <span class="nb">id</span><span class="p">(</span><span class="n">y</span><span class="p">)</span>
16		<span class="go">(3077159616L, 3077159584L)</span>
17		<span class="gp">>>> </span><span class="n">x</span> <span class="o">=</span> <span class="s">"a"</span><span class="o">*</span><span class="mf">20</span>
18		<span class="gp">>>> </span><span class="n">y</span> <span class="o">=</span> <span class="s">"a"</span><span class="o">*</span><span class="mf">20</span>
19		<span class="gp">>>> </span><span class="n">z</span> <span class="o">=</span> <span class="s">"a"</span><span class="o">*</span><span class="mf">21</span>
20		<span class="gp">>>> </span><span class="n">w</span> <span class="o">=</span> <span class="s">"a"</span><span class="o">*</span><span class="mf">21</span>
21		<span class="gp">>>> </span><span class="nb">id</span><span class="p">(</span><span class="n">x</span><span class="p">),</span> <span class="nb">id</span><span class="p">(</span><span class="n">y</span><span class="p">),</span> <span class="nb">id</span><span class="p">(</span><span class="n">z</span><span class="p">),</span> <span class="nb">id</span><span class="p">(</span><span class="n">w</span><span class="p">)</span>
22		<span class="go">(3079663488L, 3079663488L, 3079721328L, 3079721568L)</span>
23		</pre></div>
24		</li>
25
26		<li>Single characters and empty string held in permament cache (Objects/stringobject.c).</li>
27
28		<li>Constants strings of size <= 20 cache by parser (TODO: check).</li>
29
30		<li>PyString_InternInPlace (PyUnicode_InternInPlace in 3.0) results in strings being stored in internal dictionary.<ul><li>Reference in interned not counted in reference count (nasty hack to hide this from users).</li>
31		</ul></li>
32
33		<li>Strings are replaced by Unicode in 3.0</li>
	8	<div style='margin: auto; width: 50%;'><h2>object.c</h2><ul style='list-style-type: none;'>
	9	<li><img src='tabs.png' alt='' /></li>
34	10	</ul>
35		</div><~~br /><div class="footer"><hr />Everything You Didn't Want to Known A~~bout Python Objects</div></body></html>
	11	</div><a accesskey="J" href="pyobjects-3.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a accesskey="K" href="pyobjects-5.html">Next</a><br /><div class="footer" style="font-style: italic;"><hr />Everything You Didn't Want to Know about Python Objects</div></body></html>

hodgestar/Talks/PythonObjects/html/pyobjects-5.html

r340	r345
1	1	<html>
2	2	<head>
3		<title>Everything You Didn't Want to Know~~n A~~bout Python Objects</title>
	3	<title>Everything You Didn't Want to Know about Python Objects</title>
4	4	<link rel="stylesheet" type="text/css" href="main.css" />
5	5	<link rel="stylesheet" type="text/css" href="pygment.css" />
6	6	</head>
7	7	<body>
8		<a accesskey="P" href="pyobjects-4.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a acesskey="N" href="pyobjects-6.html">Next</a><div style='margin: auto; width: 50%;'><h2>Find Big Dict</h2><ul>
9		<li>Util:<div class="highlight"><pre><span class="k">def</span> <span class="nf">find_big_dict</span><span class="p">(</span><span class="n">x</span><span class="p">):</span>
10		<span class="k">import</span> <span class="nn">gc</span>
11		<span class="k">for</span> <span class="n">obj</span> <span class="ow">in</span> <span class="n">gc</span><span class="o">.</span><span class="n">get_referrers</span><span class="p">(</span><span class="n">x</span><span class="p">):</span>
12		<span class="k">if</span> <span class="nb">type</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span> <span class="ow">is</span> <span class="nb">dict</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span> <span class="o">></span> <span class="mf">1000</span><span class="p">:</span>
13		<span class="k">return</span> <span class="n">obj</span>
14		<span class="k">return</span> <span class="bp">None</span>
	8	<div style='margin: auto; width: 50%;'><h2>Strings</h2><ul>
	9	<li>Examples:<div class="highlight"><pre><span class="gp">>>> </span><span class="n">x</span> <span class="o">=</span> <span class="nb">chr</span><span class="p">(</span><span class="mf">13</span><span class="p">)</span>
	10	<span class="gp">>>> </span><span class="n">y</span> <span class="o">=</span> <span class="nb">chr</span><span class="p">(</span><span class="mf">13</span><span class="p">)</span>
	11	<span class="gp">>>> </span><span class="nb">id</span><span class="p">(</span><span class="n">x</span><span class="p">),</span> <span class="nb">id</span><span class="p">(</span><span class="n">y</span><span class="p">)</span>
	12	<span class="go">(3082874688L, 3082874688L)</span>
	13	<span class="gp">>>> </span><span class="n">x</span> <span class="o">=</span> <span class="nb">chr</span><span class="p">(</span><span class="mf">13</span><span class="p">)</span> <span class="o">+</span> <span class="nb">chr</span><span class="p">(</span><span class="mf">14</span><span class="p">)</span>
	14	<span class="gp">>>> </span><span class="n">y</span> <span class="o">=</span> <span class="nb">chr</span><span class="p">(</span><span class="mf">13</span><span class="p">)</span> <span class="o">+</span> <span class="nb">chr</span><span class="p">(</span><span class="mf">14</span><span class="p">)</span>
	15	<span class="gp">>>> </span><span class="nb">id</span><span class="p">(</span><span class="n">x</span><span class="p">),</span> <span class="nb">id</span><span class="p">(</span><span class="n">y</span><span class="p">)</span>
	16	<span class="go">(3077159616L, 3077159584L)</span>
	17	<span class="gp">>>> </span><span class="n">x</span> <span class="o">=</span> <span class="s">"a"</span><span class="o">*</span><span class="mf">20</span>
	18	<span class="gp">>>> </span><span class="n">y</span> <span class="o">=</span> <span class="s">"a"</span><span class="o">*</span><span class="mf">20</span>
	19	<span class="gp">>>> </span><span class="n">z</span> <span class="o">=</span> <span class="s">"a"</span><span class="o">*</span><span class="mf">21</span>
	20	<span class="gp">>>> </span><span class="n">w</span> <span class="o">=</span> <span class="s">"a"</span><span class="o">*</span><span class="mf">21</span>
	21	<span class="gp">>>> </span><span class="nb">id</span><span class="p">(</span><span class="n">x</span><span class="p">),</span> <span class="nb">id</span><span class="p">(</span><span class="n">y</span><span class="p">),</span> <span class="nb">id</span><span class="p">(</span><span class="n">z</span><span class="p">),</span> <span class="nb">id</span><span class="p">(</span><span class="n">w</span><span class="p">)</span>
	22	<span class="go">(3079663488L, 3079663488L, 3079721328L, 3079721568L)</span>
15	23	</pre></div>
16	24	</li>
17	25
18		<li>Example:<div class="highlight"><pre><span class="gp">>>> </span><span class="n">interned</span> <span class="o">=</span> <span class="n">find_big_dict</span><span class="p">(</span><span class="s">"a"</span><span class="p">)</span>
19		</pre></div>
20		</li>
	26	<li>Single characters and empty string held in permament cache (Objects/stringobject.c).</li>
21	27
22		<li>Game:<div class="highlight"><pre><span class="gp">>>> </span><span class="k">import</span> <span class="nn">util</span>
23		<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">keyword_quiz</span><span class="p">()</span>
24		</pre></div>
25		</li>
	28	<li>Constants strings of size <= 20 interned by parser.</li>
	29
	30	<li>PyString_InternInPlace (PyUnicode_InternInPlace in 3.0) results in strings being stored in internal dictionary.<ul><li>Reference in interned not counted in reference count (nasty hack to hide this from users).</li>
	31	</ul></li>
	32
	33	<li>Strings are replaced by Unicode in 3.0</li>
26	34	</ul>
27		</div><~~br /><div class="footer"><hr />Everything You Didn't Want to Known A~~bout Python Objects</div></body></html>
	35	</div><a accesskey="J" href="pyobjects-4.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a accesskey="K" href="pyobjects-6.html">Next</a><br /><div class="footer" style="font-style: italic;"><hr />Everything You Didn't Want to Know about Python Objects</div></body></html>

hodgestar/Talks/PythonObjects/html/pyobjects-6.html

r340	r345
1	1	<html>
2	2	<head>
3		<title>Everything You Didn't Want to Know~~n A~~bout Python Objects</title>
	3	<title>Everything You Didn't Want to Know about Python Objects</title>
4	4	<link rel="stylesheet" type="text/css" href="main.css" />
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8		<a accesskey="P" href="pyobjects-5.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a acesskey="N" href="pyobjects-7.html">Next</a><div style='margin: auto; width: 50%;'><h2>Ints</h2><ul>
9		<li>For efficiency, ints are not malloc'ed singly but in PyIntBlocks.</li>
10
11		<li>Ints are replaced by Longs in 3.0 -- malloc list is gone.</li>
12
13		<li><div class="highlight"><pre><span class="go">Python 2.6a3+ (trunk:64269M, Jun 14 2008, 11:36:56) </span>
14		<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span>
15		<span class="go">5849088.0</span>
16		<span class="gp">>>> </span><span class="n">z</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">range</span><span class="p">(</span><span class="mf">1000000</span><span class="p">))</span>
17		<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span>
18		<span class="go">22380544.0</span>
19		<span class="gp">>>> </span><span class="k">del</span> <span class="n">z</span>
20		<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span>
21		<span class="go">17879040.0</span>
	8	<div style='margin: auto; width: 50%;'><h2>Find Big Dict</h2><ul>
	9	<li>Util:<div class="highlight"><pre><span class="k">def</span> <span class="nf">find_big_dict</span><span class="p">(</span><span class="n">x</span><span class="p">):</span>
	10	<span class="k">import</span> <span class="nn">gc</span>
	11	<span class="k">for</span> <span class="n">obj</span> <span class="ow">in</span> <span class="n">gc</span><span class="o">.</span><span class="n">get_referrers</span><span class="p">(</span><span class="n">x</span><span class="p">):</span>
	12	<span class="k">if</span> <span class="nb">type</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span> <span class="ow">is</span> <span class="nb">dict</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span> <span class="o">></span> <span class="mf">1000</span><span class="p">:</span>
	13	<span class="k">return</span> <span class="n">obj</span>
	14	<span class="k">return</span> <span class="bp">None</span>
22	15	</pre></div>
23	16	</li>
24	17
25		<li><div class="highlight"><pre><span class="go">Python 3.0a5+ (py3k:64080, Jun 10 2008, 18:22:21)</span>
26		<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span>
27		<span class="go">9302016.0</span>
28		<span class="gp">>>> </span><span class="n">z</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">range</span><span class="p">(</span><span class="mf">1000000</span><span class="p">))</span>
29		<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span>
30		<span class="go">29011968.0</span>
31		<span class="gp">>>> </span><span class="k">del</span> <span class="n">z</span>
32		<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span>
33		<span class="go">9302016.0</span>
	18	<li>Example:<div class="highlight"><pre><span class="gp">>>> </span><span class="n">interned</span> <span class="o">=</span> <span class="n">find_big_dict</span><span class="p">(</span><span class="s">"a"</span><span class="p">)</span>
	19	</pre></div>
	20	</li>
	21
	22	<li>Game:<div class="highlight"><pre><span class="gp">>>> </span><span class="k">import</span> <span class="nn">util</span>
	23	<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">keyword_quiz</span><span class="p">()</span>
34	24	</pre></div>
35	25	</li>
36	26	</ul>
37		</div><~~br /><div class="footer"><hr />Everything You Didn't Want to Known A~~bout Python Objects</div></body></html>
	27	</div><a accesskey="J" href="pyobjects-5.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a accesskey="K" href="pyobjects-7.html">Next</a><br /><div class="footer" style="font-style: italic;"><hr />Everything You Didn't Want to Know about Python Objects</div></body></html>

hodgestar/Talks/PythonObjects/html/pyobjects-7.html

r340	r345
1	1	<html>
2	2	<head>
3		<title>Everything You Didn't Want to Know~~n A~~bout Python Objects</title>
	3	<title>Everything You Didn't Want to Know about Python Objects</title>
4	4	<link rel="stylesheet" type="text/css" href="main.css" />
5	5	<link rel="stylesheet" type="text/css" href="pygment.css" />
6	6	</head>
7	7	<body>
8		<a accesskey="P" href="pyobjects-6.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a acesskey="N" href="pyobjects-8.html">Next</a><div style='margin: auto; width: 50%;'><h2>Int (speed)</h2><ul>
9		<li><div class="highlight"><pre><span class="go">$ ./python -m timeit "list(x for x in range(230,230+1000))"</span>
10		<span class="go">10000 loops, best of 3: 176 usec per loop</span>
11		<span class="go">$ ../py3k/python -m timeit "list(x for x in range(230,230+1000))"</span>
12		<span class="go">1000 loops, best of 3: 202 usec per loop</span>
13		<span class="go">$ ./python -m timeit "list(x for x in range(237,237+1000))"</span>
14		<span class="go">1000 loops, best of 3: 311 usec per loop</span>
15		<span class="go">$ ../py3k/python -m timeit "list(x for x in range(237,237+1000))"</span>
16		<span class="go">1000 loops, best of 3: 431 usec per loop</span>
17		<span class="go">$ ./python -m timeit "list(x for x in range(263,263+1000))"</span>
18		<span class="go">1000 loops, best of 3: 320 usec per loop</span>
19		<span class="go">$ ../py3k/python -m timeit "list(x for x in range(263,263+1000))"</span>
20		<span class="go">1000 loops, best of 3: 439 usec per loop</span>
	8	<div style='margin: auto; width: 50%;'><h2>Ints</h2><ul>
	9	<li>For efficiency, ints are not malloc'ed singly but in PyIntBlocks.</li>
	10
	11	<li>Ints are replaced by Longs in 3.0 -- malloc list is gone.</li>
	12
	13	<li><div class="highlight"><pre><span class="go">Python 2.6a3+ (trunk:64269M, Jun 14 2008, 11:36:56) </span>
	14	<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span>
	15	<span class="go">5849088.0</span>
	16	<span class="gp">>>> </span><span class="n">z</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">range</span><span class="p">(</span><span class="mf">1000000</span><span class="p">))</span>
	17	<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span>
	18	<span class="go">22380544.0</span>
	19	<span class="gp">>>> </span><span class="k">del</span> <span class="n">z</span>
	20	<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span>
	21	<span class="go">17879040.0</span>
	22	</pre></div>
	23	</li>
	24
	25	<li><div class="highlight"><pre><span class="go">Python 3.0a5+ (py3k:64080, Jun 10 2008, 18:22:21)</span>
	26	<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span>
	27	<span class="go">9302016.0</span>
	28	<span class="gp">>>> </span><span class="n">z</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">range</span><span class="p">(</span><span class="mf">1000000</span><span class="p">))</span>
	29	<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span>
	30	<span class="go">29011968.0</span>
	31	<span class="gp">>>> </span><span class="k">del</span> <span class="n">z</span>
	32	<span class="gp">>>> </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span>
	33	<span class="go">9302016.0</span>
21	34	</pre></div>
22	35	</li>
23	36	</ul>
24		</div><~~br /><div class="footer"><hr />Everything You Didn't Want to Known A~~bout Python Objects</div></body></html>
	37	</div><a accesskey="J" href="pyobjects-6.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a accesskey="K" href="pyobjects-8.html">Next</a><br /><div class="footer" style="font-style: italic;"><hr />Everything You Didn't Want to Know about Python Objects</div></body></html>

hodgestar/Talks/PythonObjects/html/pyobjects-8.html

r340	r345
1	1	<html>
2	2	<head>
3		<title>Everything You Didn't Want to Know~~n A~~bout Python Objects</title>
	3	<title>Everything You Didn't Want to Know about Python Objects</title>
4	4	<link rel="stylesheet" type="text/css" href="main.css" />
5	5	<link rel="stylesheet" type="text/css" href="pygment.css" />
6	6	</head>
7	7	<body>
8		<a accesskey="P" href="pyobjects-7.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a acesskey="N" href="pyobjects-9.html">Next</a><div style='margin: auto; width: 50%;'><h2>Floats</h2><ul>
9		<li>Like ints in 2.6, only in 3.0 as well.</li>
10
11		<li>You won't get your memory back.</li>
12
13		<li>Maybe we could remove this, run some tests and submit a patch (checking bug tracker first, of course)?</li>
14
15		<li>Perhaps just use numpy?</li>
	8	<div style='margin: auto; width: 50%;'><h2>Int (speed)</h2><ul>
	9	<li><div class="highlight"><pre><span class="go">$ ./python -m timeit "list(x for x in range(230,230+1000))"</span>
	10	<span class="go">10000 loops, best of 3: 176 usec per loop</span>
	11	<span class="go">$ ../py3k/python -m timeit "list(x for x in range(230,230+1000))"</span>
	12	<span class="go">1000 loops, best of 3: 202 usec per loop</span>
	13	<span class="go">$ ./python -m timeit "list(x for x in range(237,237+1000))"</span>
	14	<span class="go">1000 loops, best of 3: 311 usec per loop</span>
	15	<span class="go">$ ../py3k/python -m timeit "list(x for x in range(237,237+1000))"</span>
	16	<span class="go">1000 loops, best of 3: 431 usec per loop</span>
	17	<span class="go">$ ./python -m timeit "list(x for x in range(263,263+1000))"</span>
	18	<span class="go">1000 loops, best of 3: 320 usec per loop</span>
	19	<span class="go">$ ../py3k/python -m timeit "list(x for x in range(263,263+1000))"</span>
	20	<span class="go">1000 loops, best of 3: 439 usec per loop</span>
	21	</pre></div>
	22	</li>
16	23	</ul>
17		</div><~~br /><div class="footer"><hr />Everything You Didn't Want to Known A~~bout Python Objects</div></body></html>
	24	</div><a accesskey="J" href="pyobjects-7.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a accesskey="K" href="pyobjects-9.html">Next</a><br /><div class="footer" style="font-style: italic;"><hr />Everything You Didn't Want to Know about Python Objects</div></body></html>

hodgestar/Talks/PythonObjects/html/pyobjects-9.html

r340	r345
1	1	<html>
2	2	<head>
3		<title>Everything You Didn't Want to Know~~n A~~bout Python Objects</title>
	3	<title>Everything You Didn't Want to Know about Python Objects</title>
4	4	<link rel="stylesheet" type="text/css" href="main.css" />
5	5	<link rel="stylesheet" type="text/css" href="pygment.css" />
6	6	</head>
7	7	<body>
8		<a accesskey="P" href="pyobjects-8.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a acesskey="N" href="pyobjects-10.html">Next</a><div style='margin: auto; width: 50%;'><h2>PyObject C API</h2><ul>
9		<li>List of methods unchanged between 2.5 and 2.6</li>
	8	<div style='margin: auto; width: 50%;'><h2>Floats</h2><ul>
	9	<li>Like ints in 2.6, only in 3.0 as well.</li>
	10
	11	<li>You won't get your memory back.</li>
	12
	13	<li>Maybe we could remove this, run some tests and submit a patch (checking bug tracker first, of course)?</li>
	14
	15	<li>Perhaps just use numpy?</li>
10	16	</ul>
11		</div><~~br /><div class="footer"><hr />Everything You Didn't Want to Known A~~bout Python Objects</div></body></html>
	17	</div><a accesskey="J" href="pyobjects-8.html">Prev</a> \| <a href="pyobjects-0.html">Index</a> \| <a accesskey="K" href="pyobjects-10.html">Next</a><br /><div class="footer" style="font-style: italic;"><hr />Everything You Didn't Want to Know about Python Objects</div></body></html>

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