source: general/prog/python2.xml@ 4949485e

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY python2-download-http "http://www.python.org/ftp/python/&python2-version;/Python-&python2-version;.tar.xz">
  <!ENTITY python2-download-ftp  " ">
  <!-- <!ENTITY python2-download-ftp  "&gentoo-ftp-repo;/Python-&python2-version;.tar.xz"> -->
  <!ENTITY python2-md5sum        "75c87a80c6ddb0b785a57ea3583e04fa">
  <!ENTITY python2-size          "9.5 MB">
  <!ENTITY python2-buildsize     "235 MB (not including the test suite)">
  <!ENTITY python2-time          "1 SBU (not including the test suite)">
  <!ENTITY python2htmldoc-download-http "http://docs.python.org/ftp/python/doc/&python2-version;/python-&python2-version;-docs-html.tar.bz2">
  <!ENTITY python2htmldoc-md5sum        "40f0bd51b221662cae14fb0c6b6f622b">
  <!ENTITY python2htmldoc-size          "4.1 MB">
]>

<sect1 id="python" xreflabel="Python-&python2-version;">
  <?dbhtml filename="python2.html" ?>

  <sect1info>
    <othername>$LastChangedBy$</othername>
    <date>$Date$</date>
  </sect1info>

  <title>Python-&python2-version;</title>

  <indexterm zone="python">
    <primary sortas="a-Python2">Python</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to Python 2</title>

    <para>The <application>Python 2</application> package contains the
    <application>Python</application> development environment.
    This is useful for object-oriented programming, writing scripts,
    prototyping large programs or developing entire applications.  This version
    is for backward compatibility with other dependent packages.</para>

    <!-- Python compiled against Pth, OpenSSL, and SQLite.
         326 tests OK, 36 tests skipped, 0 failures -->

    &lfs70_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>Download (HTTP): <ulink url="&python2-download-http;"/></para>
      </listitem>
      <listitem>
        <para>Download (FTP): <ulink url="&python2-download-ftp;"/></para>
      </listitem>
      <listitem>
        <para>Download MD5 sum: &python2-md5sum;</para>
      </listitem>
      <listitem>
        <para>Download size: &python2-size;</para>
      </listitem>
      <listitem>
        <para>Estimated disk space required: &python2-buildsize;</para>
      </listitem>
      <listitem>
        <para>Estimated build time: &python2-time;</para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Additional Downloads</bridgehead>

    <itemizedlist spacing='compact'>
      <title>Optional HTML Documentation</title>
      <listitem>
        <para>Download (HTTP): <ulink url="&python2htmldoc-download-http;"/></para>
      </listitem>
      <listitem>
        <para>Download MD5 sum: &python2htmldoc-md5sum;</para>
      </listitem>
      <listitem>
        <para>Download size: &python2htmldoc-size;</para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Python Dependencies</bridgehead>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional"><xref linkend="pth"/>,
    <xref linkend="libffi"/> or <xref linkend="gcc"/> (install JAVA so that the 
    <filename class="libraryfile">libffi</filename> library is built), and
    <ulink url="http://www.bluez.org/">BlueZ</ulink></para>

    <bridgehead renderas="sect4">Optional
    (to create package-specific support modules)</bridgehead>
    <para role="optional"><xref linkend="openssl"/>,
    <xref linkend="tk"/>,
    <xref linkend="db"/>, and
    <xref linkend="sqlite"/></para>

    <para>Note that there is a circular dependency with the
    <application>Tk</application> package as it requires Xorg to be installed
    but parts of Xorg depend on <application>Python</application>.</para>

    <para condition="html" role="usernotes">User Notes:
    <ulink url="&blfs-wiki;/Python"/></para>

  </sect2>

  <sect2 role="installation">
    <title>Installation of Python</title>

    <para>Install <application>Python</application> by running the following
    commands:</para>

<screen><userinput>sed -i "s/ndbm_libs = \[\]/ndbm_libs = ['gdbm', 'gdbm_compat']/" setup.py &amp;&amp;
./configure --prefix=/usr --enable-shared &amp;&amp;
make</userinput></screen>

    <para>To test the results, issue: <command>make test</command>. Note that
    if you have an existing <application>Python 2</application> installation
    which includes the <application>PyXML</application> module, the tests could
    produce a segmentation fault.</para>

    <para>Now, as the <systemitem class="username">root</systemitem> user:</para>

<screen role="root"><userinput>make install &amp;&amp;
chmod -v 755 /usr/lib/libpython&python2-majorver;.so.1.0</userinput></screen>

    <para>There is no documentation installed using the instructions above.
    See the <filename>Doc/README.txt</filename> file in the source
    distribution for instructions on how to create the html. Alternatively,
    you can download preformatted documentation from <ulink
    url="http://docs.python.org/download.html"/>.</para>

    <para>In order to use the <command>help ('name_string')</command> feature
    of the <command>python</command> interpreter with some statements and
    keywords, you must download (or create) the optional HTML documentation
    and install it. If you downloaded the HTML docs, issue the following
    commands as the
    <systemitem class="username">root</systemitem> user:</para>

<screen role="root"><userinput>install -v -m755 -d /usr/share/doc/Python-&python2-version;/html &amp;&amp;
tar --strip-components=1 \
    --no-same-owner \
    --no-same-permissions \
    -C /usr/share/doc/Python-&python2-version;/html \
    -xvf ../python-&python2-version;-docs-html.tar.bz2</userinput></screen>

  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para><command>sed -i "s/ndbm_libs = ..." setup.py</command>: This command
    is used to fix a build problem with the <application>GDBM</application>
    library.</para>

    <para><command>chmod ...</command>: Fix permissions for libraries to be 
    consistent with other libraries.</para>

  </sect2>

  <sect2 role="configuration">
    <title>Configuring Python 2</title>

    <para>In order for <command>python</command> to find the installed
    documentation, you must add the following environment variable to
    individual user's or the system's profile:</para>

    <screen role="root"><userinput>export PYTHONDOCS=/usr/share/doc/Python-&python2-version;/html</userinput></screen>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Libraries</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>pydoc, python, python-config, python&python2-majorver;,
        python&python2-majorver;-config, smtpd.py, and optionally if
        <application>Tk</application> is installed, idle</seg>
        <seg>libpython&python2-majorver;.so and numerous modules installed in
        /usr/lib/python&python2-majorver;/lib-dynload</seg>
        <seg>/usr/include/python&python2-majorver;,
        /usr/lib/python&python2-majorver;, and
        /usr/share/doc/python-&python2-version;</seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="idle2">
        <term><command>idle</command></term>
        <listitem>
          <para>is a wrapper script that opens a
          <application>Python</application> aware GUI editor.</para>
          <indexterm zone="python idle2">
            <primary sortas="b-idle2">idle</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="pydoc2">
        <term><command>pydoc</command></term>
        <listitem>
          <para>is the <application>Python</application> documentation
          tool.</para>
          <indexterm zone="python pydoc2">
            <primary sortas="b-pydoc2">pydoc</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="python2-prog">
        <term><command>python</command></term>
        <listitem>
          <para>is an interpreted, interactive, object-oriented programming
          language.</para>
          <indexterm zone="python python2-prog">
            <primary sortas="b-python">python</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="python2-ver">
        <term><command>python&python2-majorver;</command></term>
        <listitem>
          <para>is a version-specific name for the <command>python</command>
          program.</para>
          <indexterm zone="python python2-ver">
            <primary sortas="b-python&python2-majorver;">python&python2-majorver;</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="smtpd.py2">
        <term><command>smtpd.py</command></term>
        <listitem>
          <para>is an SMTP proxy implemented in
          <application>Python</application>.</para>
          <indexterm zone="python smtpd.py2">
            <primary sortas="b-smtpd.py2">smtpd.py</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>