source: chapter08/python.xml@ 93db1e61

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Last change on this file since 93db1e61 was 93db1e61, checked in by Xi Ruoyao <xry111@…>, 5 months ago

python: fix a typo

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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-system-Python" role="wrap">
9 <?dbhtml filename="Python.html"?>
10
11 <sect1info condition="script">
12 <productname>Python</productname>
13 <productnumber>&python-version;</productnumber>
14 <address>&python-url;</address>
15 </sect1info>
16
17 <title>Python-&python-version;</title>
18
19 <indexterm zone="ch-system-Python">
20 <primary sortas="a-Python">Python</primary>
21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
26 <para>The Python 3 package contains the Python development environment. It
27 is useful for object-oriented programming, writing scripts, prototyping
28 large programs, or developing entire applications.</para>
29
30 <segmentedlist>
31 <segtitle>&buildtime;</segtitle>
32 <segtitle>&diskspace;</segtitle>
33
34 <seglistitem>
35 <seg>&python-fin-sbu;</seg>
36 <seg>&python-fin-du;</seg>
37 </seglistitem>
38 </segmentedlist>
39
40 </sect2>
41
42 <sect2 role="installation">
43 <title>Installation of Python 3</title>
44
45 <para>Prepare Python for compilation:</para>
46
47<screen><userinput remap="configure">./configure --prefix=/usr \
48 --enable-shared \
49 --with-system-expat \
50 --with-system-ffi \
51 --enable-optimizations</userinput></screen>
52
53 <variablelist>
54 <title>The meaning of the configure options:</title>
55
56 <varlistentry>
57 <term><parameter>--with-system-expat</parameter></term>
58 <listitem>
59 <para>This switch enables linking against system version of
60 <application>Expat</application>.</para>
61 </listitem>
62 </varlistentry>
63
64 <varlistentry>
65 <term><parameter>--with-system-ffi</parameter></term>
66 <listitem>
67 <para>This switch enables linking against system version of
68 <application>libffi</application>.</para>
69 </listitem>
70 </varlistentry>
71
72 <varlistentry>
73 <term><parameter>--enable-optimizations</parameter></term>
74 <listitem>
75 <para>This switch enables stable, but expensive, optimizations.</para>
76 </listitem>
77 </varlistentry>
78
79 </variablelist>
80
81 <para>Compile the package:</para>
82
83<screen><userinput remap="make">make</userinput></screen>
84
85 <para>Running the tests at this point is not recommended. The
86 tests are known to hang indefinitely in the partial LFS environment.
87 If desired, the tests can be rerun at the end of this chapter or
88 when Python 3 is reinstalled in BLFS. To run the tests anyway,
89 issue <command>make test</command>.</para>
90
91 <para>Install the package:</para>
92
93<screen><userinput remap="install">make install</userinput></screen>
94
95 <para>In serveral places we use the <command>pip3</command> command to
96 install Python 3 programs and modules for all users as
97 <systemitem class='username'>root</systemitem>. This conflicts
98 with the Python developers recommendation to install packages into a
99 virtual environment or the home directory of a regular user (by running
100 <command>pip3</command> as this user). To this end, a multi-line warning
101 is written when using <command>pip3</command> as the
102 <systemitem class='username'>root</systemitem> user. The main reason
103 of this recommendation is for avoiding a conflict with the system
104 package manager (<command>dpkg</command> for example), but LFS does not
105 have a system-wide package manager so this is not a problem. If desired,
106 suppress this warning by running the following command:</para>
107
108<screen><userinput remap="install">sed -e '/def warn_if_run_as_root/a\ return' \
109 -i /usr/lib/python3.10/site-packages/pip/_internal/cli/req_command.py
110</userinput></screen>
111
112 <important>
113 <para>
114 In LFS and BLFS we normally build and install Python modules with the
115 <command>pip3</command> command. Please take care that the
116 <command>pip3 install</command> commands in both the books should be
117 run as the &root; user unless it's for a Python virtual environment.
118 Running a <command>pip3 install</command> as a non-&root; user may seem
119 to work fine, but it will cause the installed module to be inaccessible
120 by other users.
121 </para>
122
123 <para>
124 <command>pip3 install</command> will not reinstall an already installed
125 module by default. For using the <command>pip3 install</command>
126 command to upgrade a module (for example, from meson-0.61.3 to
127 meson-0.62.0), insert the option <parameter>--upgrade</parameter> into
128 the command line. If it's really necessary to downgrade a module or
129 reinstall the same version for some reason, insert
130 <parameter>--force-reinstall</parameter> into the command line.
131 </para>
132 </important>
133
134 <para>If desired, install the preformatted documentation:</para>
135
136<screen><userinput remap="install">install -v -dm755 /usr/share/doc/python-&python-version;/html
137
138tar --strip-components=1 \
139 --no-same-owner \
140 --no-same-permissions \
141 -C /usr/share/doc/python-&python-version;/html \
142 -xvf ../python-&python-version;-docs-html.tar.bz2</userinput></screen>
143
144 <variablelist>
145 <title>The meaning of the documentation install commands:</title>
146
147 <varlistentry>
148 <term><option>--no-same-owner</option> and <option>--no-same-permissions</option></term>
149 <listitem>
150 <para>Ensure the installed files have the correct ownership and
151 permissions. Without these options, using <application>tar</application>
152 will install the package files with the upstream creator's values.
153 </para>
154 </listitem>
155 </varlistentry>
156
157 </variablelist>
158
159 </sect2>
160
161 <sect2 id="contents-python" role="content">
162 <title>Contents of Python 3</title>
163
164 <segmentedlist>
165 <segtitle>Installed Programs</segtitle>
166 <segtitle>Installed Library</segtitle>
167 <segtitle>Installed Directories</segtitle>
168
169 <seglistitem>
170 <seg>
171 2to3, idle3, pip3, pydoc3, python3, and python3-config
172 </seg>
173 <seg>
174 libpython&python-minor;.so and libpython3.so
175 </seg>
176 <seg>
177 /usr/include/python&python-minor;,
178 /usr/lib/python3, and
179 /usr/share/doc/python-&python-version;
180 </seg>
181 </seglistitem>
182 </segmentedlist>
183
184 <variablelist>
185 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
186 <?dbfo list-presentation="list"?>
187 <?dbhtml list-presentation="table"?>
188
189 <varlistentry id="python-2to3">
190 <term><command>2to3</command></term>
191 <listitem>
192 <para>
193 is a <application>Python</application> program that reads
194 <application>Python 2.x</application> source code and applies a
195 series of fixes to transform it into
196 valid <application>Python 3.x</application> code
197 </para>
198 <indexterm zone="ch-system-Python">
199 <primary sortas="b-2to3">2to3</primary>
200 </indexterm>
201 </listitem>
202 </varlistentry>
203
204 <varlistentry id="idle3">
205 <term><command>idle3</command></term>
206 <listitem>
207 <para>
208 is a wrapper script that opens a <application>Python</application>
209 aware GUI editor. For this script to run, you must have installed
210 <application>Tk</application> before Python so that the Tkinter
211 Python module is built
212 </para>
213 <indexterm zone="ch-system-Python">
214 <primary sortas="b-idle3">idle3</primary>
215 </indexterm>
216 </listitem>
217 </varlistentry>
218
219 <varlistentry id="pip3">
220 <term><command>pip3</command></term>
221 <listitem>
222 <para>
223 The package installer for Python. You can use pip to install
224 packages from Python Package Index and other indexes
225 </para>
226 <indexterm zone="ch-system-Python">
227 <primary sortas="b-pip3">pip3</primary>
228 </indexterm>
229 </listitem>
230 </varlistentry>
231
232 <varlistentry id="pydoc3">
233 <term><command>pydoc3</command></term>
234 <listitem>
235 <para>
236 is the <application>Python</application> documentation tool
237 </para>
238 <indexterm zone="ch-system-Python">
239 <primary sortas="b-pydoc3">pydoc3</primary>
240 </indexterm>
241 </listitem>
242 </varlistentry>
243
244 <varlistentry id="python3">
245 <term><command>python3</command></term>
246 <listitem>
247 <para>
248 is an interpreted, interactive, object-oriented programming
249 language
250 </para>
251 <indexterm zone="ch-system-Python">
252 <primary sortas="b-python3">python3</primary>
253 </indexterm>
254 </listitem>
255 </varlistentry>
256
257 </variablelist>
258
259 </sect2>
260
261</sect1>
262
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