| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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| 7 | <!ENTITY python3-download-http
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| 8 | "https://www.python.org/ftp/python/&python3-version;/Python-&python3-version;.tar.xz">
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| 9 | <!ENTITY python3-download-ftp " ">
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| 10 | <!ENTITY python3-md5sum "c8d52fc4fb8ad9932a11d86d142ee73a">
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| 11 | <!ENTITY python3-size "19 MB">
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| 12 | <!ENTITY python3-buildsize "282 MB (add 897 MB for tests)">
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| 13 | <!ENTITY python3-time "2.0 SBU (add 3.9 SBU for tests; both using parallelism=4)">
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| 14 | <!--
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| 15 | Note: Size does not reflect docs that were install in LFS.
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| 16 | -->
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| 17 | <!ENTITY python3htmldoc-download-http
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| 18 | "https://www.python.org/ftp/python/doc/&python3-version;/python-&python3-version;-docs-html.tar.bz2">
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| 19 | <!ENTITY python3-docs-md5sum "7a1fc1824f7c96e779ef35fe10dde120" >
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| 20 | ]>
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| 21 |
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| 22 | <sect1 id="python3" xreflabel="Python-&python3-version;">
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| 23 | <?dbhtml filename="python3.html" ?>
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| 24 |
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| 25 |
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| 26 | <title>Python-&python3-version;</title>
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| 27 |
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| 28 | <indexterm zone="python3">
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| 29 | <primary sortas="a-Python3">Python3</primary>
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| 30 | </indexterm>
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| 31 |
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| 32 | <sect2 role="package">
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| 33 | <title>Introduction to Python 3</title>
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| 34 |
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| 35 | <para>
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| 36 | The <application>Python 3</application> package contains the
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| 37 | <application>Python</application> development environment.
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| 38 | This is useful for object-oriented programming, writing scripts,
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| 39 | prototyping large programs or developing entire applications.
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| 40 | </para>
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| 41 |
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| 42 | <note>
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| 43 | <para>
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| 44 | <application>Python 3</application> was installed in LFS.
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| 45 | The only reason to rebuild it here is if optional modules
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| 46 | are needed, or to upgrade this package.
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| 47 | </para>
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| 48 | </note>
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| 49 |
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| 50 | &lfs113_checked;
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| 51 |
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| 52 | <important>
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| 53 | <para>
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| 54 | If upgrading to a new Python-3 minor version (for example,
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| 55 | from Python-3.10.x to Python-3.11.0), you will need to reinstall
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| 56 | any Python3 modules you have installed. You should also
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| 57 | reinstall packages that generate Python3 modules
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| 58 | including
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| 59 | <xref linkend="gobject-introspection"/>,
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| 60 | <xref linkend="opencv"/>,
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| 61 | <xref linkend="graphviz"/> (if swig is installed).
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| 62 | </para>
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| 63 |
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| 64 | <para>Before you upgrade, you can get a list of modules installed
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| 65 | with <command>pip3 list</command>. The list may be incomplete as
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| 66 | some Python modules are not installed with <command>pip3</command>,
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| 67 | for example the <literal>cracklib</literal> module installed by
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| 68 | <xref role='nodep' linkend='cracklib'/>. Use <command>ls
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| 69 | /usr/lib/python3.<replaceable>minor</replaceable>/site-packages</command>
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| 70 | for a comprehensive list.
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| 71 | </para>
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| 72 |
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| 73 | <para>
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| 74 | The Python modules from LFS will also have to be reinstalled:
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| 75 | <ulink url="&lfs-root;/chapter08/flit-core.html">flit-core</ulink>,
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| 76 | <ulink url="&lfs-root;/chapter08/wheel.html">wheel</ulink>, and
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| 77 | <ulink url="&lfs-root;/chapter08/meson.html">meson</ulink>.
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| 78 | </para>
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| 79 |
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| 80 | <para revision="systemd">
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| 81 | On systemd systems, it is also necessary to reinstall
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| 82 | <ulink url="&lfs-root;/chapter08/markupsafe.html">MarkupSafe</ulink>
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| 83 | and <ulink url="&lfs-root;/chapter08/jinja2.html">Jinja2</ulink>.
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| 84 | </para>
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| 85 | </important>
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| 86 |
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| 87 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 88 | <itemizedlist spacing="compact">
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| 89 | <listitem>
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| 90 | <para>
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| 91 | Download (HTTP): <ulink url="&python3-download-http;"/>
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| 92 | </para>
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| 93 | </listitem>
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| 94 | <listitem>
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| 95 | <para>
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| 96 | Download (FTP): <ulink url="&python3-download-ftp;"/>
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| 97 | </para>
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| 98 | </listitem>
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| 99 | <listitem>
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| 100 | <para>
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| 101 | Download MD5 sum: &python3-md5sum;
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| 102 | </para>
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| 103 | </listitem>
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| 104 | <listitem>
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| 105 | <para>
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| 106 | Download size: &python3-size;
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| 107 | </para>
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| 108 | </listitem>
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| 109 | <listitem>
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| 110 | <para>
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| 111 | Estimated disk space required: &python3-buildsize;
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| 112 | </para>
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| 113 | </listitem>
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| 114 | <listitem>
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| 115 | <para>
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| 116 | Estimated build time: &python3-time;
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| 117 | </para>
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| 118 | </listitem>
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| 119 | </itemizedlist>
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| 120 |
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| 121 | <bridgehead renderas="sect3">Additional Optional Download</bridgehead>
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| 122 | <itemizedlist spacing="compact">
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| 123 | <listitem>
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| 124 | <para>
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| 125 | Download (HTTP): <ulink url="&python3htmldoc-download-http;"/>
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| 126 | </para>
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| 127 | </listitem>
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| 128 | <listitem>
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| 129 | <para>
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| 130 | Download MD5 sum: &python3-docs-md5sum;
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| 131 | </para>
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| 132 | </listitem>
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| 133 | </itemizedlist>
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| 134 |
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| 135 | <bridgehead renderas="sect3">Python 3 Dependencies</bridgehead>
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| 136 |
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| 137 | <bridgehead renderas="sect4">Recommended</bridgehead>
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| 138 | <para role="recommended">
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| 139 | <xref linkend="sqlite"/> (required if building firefox or thunderbird)
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| 140 | </para>
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| 141 |
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| 142 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 143 | <para role="optional">
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| 144 | <xref linkend="bluez"/>,
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| 145 | <xref linkend="gdb"/> (required for some tests),
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| 146 | <xref linkend="valgrind"/>, and
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| 147 | <ulink url="https://www.bytereef.org/mpdecimal/">libmpdec</ulink>
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| 148 | </para>
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| 149 |
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| 150 | <bridgehead renderas="sect4">Optional (For Additional Modules)</bridgehead>
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| 151 | <para role="optional">
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| 152 | <xref linkend="db"/>,
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| 153 | <xref linkend="libnsl"/>, and
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| 154 | <xref linkend="tk"/>
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| 155 | </para>
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| 156 |
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| 157 | <para condition="html" role="usernotes">User Notes:
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| 158 | <ulink url="&blfs-wiki;/Python3"/>
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| 159 | </para>
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| 160 | </sect2>
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| 161 |
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| 162 | <sect2 role="installation">
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| 163 | <title>Installation of Python 3</title>
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| 164 |
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| 165 | <para>
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| 166 | Install <application>Python 3</application> by running the following
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| 167 | commands:
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| 168 | </para>
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| 169 |
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| 170 | <screen><userinput>CXX="/usr/bin/g++" \
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| 171 | ./configure --prefix=/usr \
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| 172 | --enable-shared \
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| 173 | --with-system-expat \
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| 174 | --with-system-ffi \
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| 175 | --enable-optimizations &&
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| 176 | make</userinput></screen>
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| 177 |
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| 178 | <para>
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| 179 | To test the result, issue <command>make test</command>.
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| 180 | Some tests may need an Internet connection. Two tests, test_distutils
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| 181 | and test_embed are known to fail.
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| 182 | </para>
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| 183 |
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| 184 | <para>
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| 185 | Now, as the <systemitem class="username">root</systemitem> user:
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| 186 | </para>
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| 187 |
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| 188 | <screen role="root"><userinput>make install</userinput></screen>
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| 189 |
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| 190 | <para>
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| 191 | If upgrading and the documentation has been downloaded, optionally install
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| 192 | it as the &root; user:
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| 193 | </para>
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| 194 |
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| 195 | <screen role="root"><userinput>install -v -dm755 /usr/share/doc/python-&python3-version;/html
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| 196 |
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| 197 | tar --strip-components=1 \
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| 198 | --no-same-owner \
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| 199 | --no-same-permissions \
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| 200 | -C /usr/share/doc/python-&python3-version;/html \
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| 201 | -xvf ../python-&python3-version;-docs-html.tar.bz2</userinput></screen>
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| 202 |
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| 203 | </sect2>
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| 204 |
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| 205 | <sect2 role="commands">
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| 206 | <title>Command Explanations</title>
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| 207 |
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| 208 | <para>
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| 209 | <command> CXX="/usr/bin/g++" ./configure ...</command>: Avoid an annoying
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| 210 | message during configuration.
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| 211 | </para>
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| 212 |
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| 213 | <para>
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| 214 | <parameter>--with-system-expat</parameter>: This switch enables linking
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| 215 | against the system version of <application>Expat</application>.
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| 216 | </para>
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| 217 |
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| 218 | <para>
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| 219 | <parameter>--with-system-ffi</parameter>: This switch enables linking
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| 220 | against the system version of <application>libffi</application>.
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| 221 | </para>
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| 222 | <!--
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| 223 | <para>
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| 224 | <parameter>- -with-ensurepip=yes</parameter> : This switch enables building
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| 225 | the <command>pip</command> and <command>setuptools</command> packaging
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| 226 | programs. <command>setuptools</command> is needed for building some
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| 227 | Python modules.
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| 228 | </para>
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| 229 | -->
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| 230 | <para>
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| 231 | <option>--with-dbmliborder=bdb:gdbm:ndbm</option>: Use this switch
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| 232 | if you want to build the <application>Python</application> DBM Module
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| 233 | against <application>Berkeley DB</application> instead of
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| 234 | <application>GDBM</application>.
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| 235 | </para>
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| 236 |
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| 237 | <para>
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| 238 | <parameter>--enable-optimizations</parameter>: This switch enables
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| 239 | stable, but expensive, optimizations.
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| 240 | </para>
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| 241 |
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| 242 | <para>
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| 243 | <option>--with-lto</option>: This optional switch enables thick Link
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| 244 | Time Optimization. Unusually, it creates a much larger <filename
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| 245 | class="libraryfile">/usr/lib/python&python3-majorver;/config-&python3-majorver;-<arch>-linux-gnu/libpython&python3-majorver;.a</filename>
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| 246 | with a small increase in the time to compile
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| 247 | <application>Python</application>. Run-time results do not appear to show
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| 248 | any benefit from doing this.
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| 249 | </para>
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| 250 |
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| 251 | </sect2>
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| 252 |
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| 253 | <sect2 role="configuration">
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| 254 | <title>Configuring Python 3</title>
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| 255 |
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| 256 | <para>
|
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| 257 | In order for <command>python3</command> to find the installed
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| 258 | documentation, create the following version independent symlink:
|
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| 259 | </para>
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| 260 |
|
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| 261 | <screen role="root"><userinput>ln -svfn python-&python3-version; /usr/share/doc/python-3</userinput></screen>
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| 262 |
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| 263 | <para>
|
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| 264 | and add the following environment variable to the individual user's or
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| 265 | system's profile:
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| 266 | </para>
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| 267 |
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| 268 | <screen role="root"><userinput>export PYTHONDOCS=/usr/share/doc/python-3/html</userinput></screen>
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| 269 |
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| 270 | </sect2>
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| 271 |
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| 272 | <sect2 role="content">
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| 273 | <title>Contents</title>
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| 274 |
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| 275 | <segmentedlist>
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| 276 | <segtitle>Installed Programs</segtitle>
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| 277 | <segtitle>Installed Libraries</segtitle>
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| 278 | <segtitle>Installed Directories</segtitle>
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| 279 |
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| 280 | <seglistitem>
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| 281 | <seg>
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| 282 | 2to3 (symlink) and
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| 283 | 2to3-&python3-majorver;,
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| 284 |
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| 285 | <!--
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| 286 | easy_install-&python3-majorver;,
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| 287 | -->
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| 288 |
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| 289 | idle3 (symlink) and
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| 290 | idle&python3-majorver;,
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| 291 |
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| 292 | pip3 (symlink) and
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| 293 | pip&python3-majorver;,
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| 294 |
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| 295 | pydoc3 and
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| 296 | pydoc&python3-majorver;,
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| 297 |
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| 298 | python3 (symlink);
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| 299 | python&python3-majorver;, and
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| 300 |
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| 301 | python3-config (symlink) and
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| 302 | python&python3-majorver;-config
|
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| 303 | </seg>
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| 304 | <seg>
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| 305 | libpython&python3-majorver;.so and libpython3.so
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| 306 | </seg>
|
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| 307 | <seg>
|
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| 308 | /usr/include/python&python3-majorver;,
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| 309 | /usr/lib/python&python3-majorver;, and
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| 310 | /usr/share/doc/python-&python3-version;
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| 311 | </seg>
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| 312 | </seglistitem>
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| 313 | </segmentedlist>
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| 314 |
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| 315 | <variablelist>
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| 316 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
|
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| 317 | <?dbfo list-presentation="list"?>
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| 318 | <?dbhtml list-presentation="table"?>
|
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| 319 | <!--
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| 320 | <varlistentry id="2to3">
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| 321 | <term><command>2to3</command></term>
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| 322 | <listitem>
|
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| 323 | <para>
|
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| 324 | is designed to assist in the transition between python2 and python3
|
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| 325 | by automatically converting code to be Python3 compatible.
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| 326 | </para>
|
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| 327 | <indexterm zone="python3 2to3">
|
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| 328 | <primary sortas="b-2to3">2to3</primary>
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| 329 | </indexterm>
|
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| 330 | </listitem>
|
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| 331 | </varlistentry>
|
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| 332 | Put here for easy use when removing Python2 -->
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| 333 | <!--
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| 334 | <varlistentry id="easy_install">
|
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| 335 | <term><command>easy_install</command></term>
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| 336 | <listitem>
|
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| 337 | <para>
|
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| 338 | is a frontend to pip3 to make it easier to configure python modules
|
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| 339 | through the PIP package manager
|
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| 340 | </para>
|
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| 341 | <indexterm zone="python3 easy_install">
|
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| 342 | <primary sortas="python3 easy_install">easy_install</primary>
|
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| 343 | </indexterm>
|
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| 344 | </listitem>
|
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| 345 | </varlistentry>
|
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| 346 | -->
|
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| 347 | <varlistentry id="idle3">
|
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| 348 | <term><command>idle3</command></term>
|
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| 349 | <listitem>
|
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| 350 | <para>
|
|---|
| 351 | is a wrapper script that opens a <application>Python</application>
|
|---|
| 352 | aware GUI editor. For this script to run, you must have installed
|
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| 353 | <application>Tk</application> before Python so that the Tkinter
|
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| 354 | Python module is built
|
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| 355 | </para>
|
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| 356 | <indexterm zone="python3 idle3">
|
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| 357 | <primary sortas="b-idle3">idle3</primary>
|
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| 358 | </indexterm>
|
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| 359 | </listitem>
|
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| 360 | </varlistentry>
|
|---|
| 361 |
|
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| 362 | <varlistentry id="pydoc3">
|
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| 363 | <term><command>pydoc3</command></term>
|
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| 364 | <listitem>
|
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| 365 | <para>
|
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| 366 | is the <application>Python</application> documentation
|
|---|
| 367 | tool
|
|---|
| 368 | </para>
|
|---|
| 369 | <indexterm zone="python3 pydoc3">
|
|---|
| 370 | <primary sortas="b-pydoc3">pydo3c</primary>
|
|---|
| 371 | </indexterm>
|
|---|
| 372 | </listitem>
|
|---|
| 373 | </varlistentry>
|
|---|
| 374 |
|
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| 375 | <varlistentry id="python3-prog">
|
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| 376 | <term><command>python3</command></term>
|
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| 377 | <listitem>
|
|---|
| 378 | <para>
|
|---|
| 379 | is an interpreted, interactive, object-oriented programming
|
|---|
| 380 | language
|
|---|
| 381 | </para>
|
|---|
| 382 | <indexterm zone="python3 python3-prog">
|
|---|
| 383 | <primary sortas="b-python3">python3</primary>
|
|---|
| 384 | </indexterm>
|
|---|
| 385 | </listitem>
|
|---|
| 386 | </varlistentry>
|
|---|
| 387 |
|
|---|
| 388 | <varlistentry id="python-ver">
|
|---|
| 389 | <term><command>python&python3-majorver;</command></term>
|
|---|
| 390 | <listitem>
|
|---|
| 391 | <para>
|
|---|
| 392 | is a version-specific name for the <command>python</command>
|
|---|
| 393 | program
|
|---|
| 394 | </para>
|
|---|
| 395 | <indexterm zone="python3 python-ver">
|
|---|
| 396 | <primary sortas="b-python&python3-majorver;">python&python3-majorver;</primary>
|
|---|
| 397 | </indexterm>
|
|---|
| 398 | </listitem>
|
|---|
| 399 | </varlistentry>
|
|---|
| 400 | <!--
|
|---|
| 401 | <varlistentry id="pyvenv">
|
|---|
| 402 | <term><command>pyvenv</command></term>
|
|---|
| 403 | <listitem>
|
|---|
| 404 | <para>
|
|---|
| 405 | creates virtual <application>Python</application> environments in
|
|---|
| 406 | one or more target directories.
|
|---|
| 407 | </para>
|
|---|
| 408 | <indexterm zone="python3 pyvenv">
|
|---|
| 409 | <primary
|
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| 410 | sortas="b-python&python3-majorver;">python&python3-majorver;</primary>
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| 411 | </indexterm>
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| 412 | </listitem>
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| 413 | </varlistentry>
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|---|
| 414 | -->
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| 415 | </variablelist>
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|---|
| 416 |
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| 417 | </sect2>
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|---|
| 418 |
|
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| 419 | </sect1>
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|---|
