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#require pygments serve
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  $ cat <<EOF >> $HGRCPATH
  > [extensions]
  > highlight =
  > [web]
  > pygments_style = friendly
  > highlightfiles = **.py and size('<100KB')
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  > EOF
  $ hg init test
  $ cd test

  $ filterhtml () {
  >   sed -e "s/class=\"k\"/class=\"kn\"/g" \
  >       -e "s/class=\"mf\"/class=\"mi\"/g" \
  >       -e "s/class=\"vm\"/class=\"n\"/g" \
  >       -e "s/class=\"\([cs]\)[h12]\"/class=\"\1\"/g"
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create random Python file to exercise Pygments

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  > """Fun with generators. Corresponding Haskell implementation:
  > 
  > primes = 2 : sieve [3, 5..]
  >     where sieve (p:ns) = p : sieve [n | n <- ns, mod n p /= 0]
  > """
  > 
  > import itertools
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  > 
  > def primes():
  >     """Generate all primes."""
  >     def sieve(ns):
  >         p = ns.next()
  >         # It is important to yield *here* in order to stop the
  >         # infinite recursion.
  >         yield p
  >         ns = itertools.ifilter(lambda n: n % p != 0, ns)
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  >         for n in sieve(ns):
  >             yield n
  > 
  >     odds = itertools.ifilter(lambda i: i % 2 == 1, itertools.count())
  >     dropwhile = itertools.dropwhile
  >     return itertools.chain([2], sieve(dropwhile(lambda n: n < 3, odds)))
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  > 
  > if __name__ == "__main__":
  >     import sys
  >     try:
  >         n = int(sys.argv[1])
  >     except (ValueError, IndexError):
  >         n = 10
  >     p = primes()
  >     print("The first %d primes: %s" % (n, list(itertools.islice(p, n))))
  $ echo >> primes.py  # to test html markup with an empty line just before EOF
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  $ hg ci -Ama
  adding primes.py

hg serve

  $ hg serve -p $HGPORT -d -n test --pid-file=hg.pid -A access.log -E errors.log
  $ cat hg.pid >> $DAEMON_PIDS

hgweb filerevision, html

  $ (get-with-headers.py localhost:$HGPORT 'file/tip/primes.py') | filterhtml
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  200 Script output follows
  
  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
  <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
  <head>
  <link rel="icon" href="/static/hgicon.png" type="image/png" />
  <meta name="robots" content="index, nofollow" />
  <link rel="stylesheet" href="/static/style-paper.css" type="text/css" />
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  <script type="text/javascript" src="/static/mercurial.js"></script>
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  <link rel="stylesheet" href="/highlightcss" type="text/css" />
  <title>test: 687f2d169546 primes.py</title>
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  </head>
  <body>
  
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  <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
   view primes.py @ 0:<a href="/rev/687f2d169546">687f2d169546</a>
   <span class="phase">draft</span> <span class="branchhead">default</span> <span class="tag">tip</span> 
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  <form class="search" action="/log">
  
  <p><input name="rev" id="search1" type="text" size="30" value="" /></p>
  <div id="hint">Find changesets by keywords (author, files, the commit message), revision
  number or hash, or <a href="/help/revsets">revset expression</a>.</div>
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   <td class="date age">Thu, 01 Jan 1970 00:00:00 +0000</td>
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  <div class="sourcefirst"> line source</div>
  <pre class="sourcelines stripes4 wrap bottomline"
       data-logurl="/log/tip/primes.py"
       data-selectabletag="SPAN"
       data-ishead="1">
  
  <span id="l1"><span class="sd">&quot;&quot;&quot;Fun with generators. Corresponding Haskell implementation:</span></span><a href="#l1"></a>
  <span id="l2"></span><a href="#l2"></a>
  <span id="l3"><span class="sd">primes = 2 : sieve [3, 5..]</span></span><a href="#l3"></a>
  <span id="l4"><span class="sd">    where sieve (p:ns) = p : sieve [n | n &lt;- ns, mod n p /= 0]</span></span><a href="#l4"></a>
  <span id="l5"><span class="sd">&quot;&quot;&quot;</span></span><a href="#l5"></a>
  <span id="l6"></span><a href="#l6"></a>
  <span id="l7"><span class="kn">import</span><span class="w"> </span><span class="nn">itertools</span></span><a href="#l7"></a> (pygments219 !)
  <span id="l7"><span class="kn">import</span> <span class="nn">itertools</span></span><a href="#l7"></a> (no-pygments219 !)
  <span id="l8"></span><a href="#l8"></a>
  <span id="l9"><span class="kn">def</span><span class="w"> </span><span class="nf">primes</span><span class="p">():</span></span><a href="#l9"></a> (pygments219 !)
  <span id="l9"><span class="kn">def</span> <span class="nf">primes</span><span class="p">():</span></span><a href="#l9"></a> (no-pygments219 !)
  <span id="l10"><span class="w">    </span><span class="sd">&quot;&quot;&quot;Generate all primes.&quot;&quot;&quot;</span></span><a href="#l10"></a> (pygments214 !)
  <span id="l10">    <span class="sd">&quot;&quot;&quot;Generate all primes.&quot;&quot;&quot;</span></span><a href="#l10"></a> (no-pygments214 !)
  <span id="l11">    <span class="kn">def</span><span class="w"> </span><span class="nf">sieve</span><span class="p">(</span><span class="n">ns</span><span class="p">):</span></span><a href="#l11"></a> (pygments219 !)
  <span id="l11">    <span class="kn">def</span> <span class="nf">sieve</span><span class="p">(</span><span class="n">ns</span><span class="p">):</span></span><a href="#l11"></a> (no-pygments219 !)
  <span id="l12">        <span class="n">p</span> <span class="o">=</span> <span class="n">ns</span><span class="o">.</span><span class="n">next</span><span class="p">()</span></span><a href="#l12"></a>
  <span id="l13">        <span class="c"># It is important to yield *here* in order to stop the</span></span><a href="#l13"></a>
  <span id="l14">        <span class="c"># infinite recursion.</span></span><a href="#l14"></a>
  <span id="l15">        <span class="kn">yield</span> <span class="n">p</span></span><a href="#l15"></a>
  <span id="l16">        <span class="n">ns</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">ifilter</span><span class="p">(</span><span class="kn">lambda</span> <span class="n">n</span><span class="p">:</span> <span class="n">n</span> <span class="o">%</span> <span class="n">p</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">,</span> <span class="n">ns</span><span class="p">)</span></span><a href="#l16"></a>
  <span id="l17">        <span class="kn">for</span> <span class="n">n</span> <span class="ow">in</span> <span class="n">sieve</span><span class="p">(</span><span class="n">ns</span><span class="p">):</span></span><a href="#l17"></a>
  <span id="l18">            <span class="kn">yield</span> <span class="n">n</span></span><a href="#l18"></a>
  <span id="l19"></span><a href="#l19"></a>
  <span id="l20">    <span class="n">odds</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">ifilter</span><span class="p">(</span><span class="kn">lambda</span> <span class="n">i</span><span class="p">:</span> <span class="n">i</span> <span class="o">%</span> <span class="mi">2</span> <span class="o">==</span> <span class="mi">1</span><span class="p">,</span> <span class="n">itertools</span><span class="o">.</span><span class="n">count</span><span class="p">())</span></span><a href="#l20"></a>
  <span id="l21">    <span class="n">dropwhile</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">dropwhile</span></span><a href="#l21"></a>
  <span id="l22">    <span class="kn">return</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">([</span><span class="mi">2</span><span class="p">],</span> <span class="n">sieve</span><span class="p">(</span><span class="n">dropwhile</span><span class="p">(</span><span class="kn">lambda</span> <span class="n">n</span><span class="p">:</span> <span class="n">n</span> <span class="o">&lt;</span> <span class="mi">3</span><span class="p">,</span> <span class="n">odds</span><span class="p">)))</span></span><a href="#l22"></a>
  <span id="l23"></span><a href="#l23"></a>
  <span id="l24"><span class="kn">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">&quot;__main__&quot;</span><span class="p">:</span></span><a href="#l24"></a>
  <span id="l25">    <span class="kn">import</span><span class="w"> </span><span class="nn">sys</span></span><a href="#l25"></a> (pygments219 !)
  <span id="l25">    <span class="kn">import</span> <span class="nn">sys</span></span><a href="#l25"></a> (no-pygments219 !)
  <span id="l26">    <span class="kn">try</span><span class="p">:</span></span><a href="#l26"></a>
  <span id="l27">        <span class="n">n</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span></span><a href="#l27"></a>
  <span id="l28">    <span class="kn">except</span> <span class="p">(</span><span class="ne">ValueError</span><span class="p">,</span> <span class="ne">IndexError</span><span class="p">):</span></span><a href="#l28"></a>
  <span id="l29">        <span class="n">n</span> <span class="o">=</span> <span class="mi">10</span></span><a href="#l29"></a>
  <span id="l30">    <span class="n">p</span> <span class="o">=</span> <span class="n">primes</span><span class="p">()</span></span><a href="#l30"></a>
  <span id="l31">    <span class="nb">print</span><span class="p">(</span><span class="s">&quot;The first </span><span class="si">%d</span><span class="s"> primes: </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">n</span><span class="p">,</span> <span class="nb">list</span><span class="p">(</span><span class="n">itertools</span><span class="o">.</span><span class="n">islice</span><span class="p">(</span><span class="n">p</span><span class="p">,</span> <span class="n">n</span><span class="p">))))</span></span><a href="#l31"></a> (pygments25 !)
  <span id="l31">    <span class="kn">print</span><span class="p">(</span><span class="s">&quot;The first </span><span class="si">%d</span><span class="s"> primes: </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">n</span><span class="p">,</span> <span class="nb">list</span><span class="p">(</span><span class="n">itertools</span><span class="o">.</span><span class="n">islice</span><span class="p">(</span><span class="n">p</span><span class="p">,</span> <span class="n">n</span><span class="p">))))</span></span><a href="#l31"></a> (no-pygments25 !)
  <span id="l32"></span><a href="#l32"></a>
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