Installing and using dynamic programming languages

Procedure

• To install Python 3.9, use:

  # dnf install python3.9

• To install Python 3.11, use:

  # dnf install python3.11

• To install Python 3.12, use:

  # dnf install python3.12

Verification

• To verify the Python version installed on your system, use the --version option with the python command specific for your required version of Python.

• For Python 3.9:

  $ python3.9 --version

• For Python 3.11:

  $ python3.11 --version

• For Python 3.12:

  $ python3.12 --version

Procedure

• To install the Requests module for Python 3.9, use:

  # dnf install python3.9-requests

• To install the pip package installer from Python 3.9, use:

  # dnf install python3.9-pip

• To install the pip package installer from Python 3.11, use:

  # dnf install python3.11-pip

• To install the pip package installer from Python 3.12, use:

  # dnf install python3.12-pip

• python3*-idle
• python3*-debug
• python3*-Cython
• python3.11-pytest and its dependencies
• python3.12-pytest and its dependencies.

Prerequisites

• Ensure that Python is installed.
• If you want to download and install third-party applications for Python 3.11 or Python 3.12, install the python3.11-pip or python3.12-pip package.

Procedure

• To run the Python 3.9 interpreter or related commands, use, for example:

  $ python3.9
  $ python3.9 -m venv --help
  $ python3.9 -m pip install package
  $ pip3 install package

• To run the Python 3.11 interpreter or related commands, use, for example:

  $ python3.11
  $ python3.11 -m venv --help
  $ python3.11 -m pip install package
  $ pip3.11 install package

• To run the Python 3.12 interpreter or related commands, use, for example:

  $ python3.12
  $ python3.12 -m venv --help
  $ python3.12 -m pip install package
  $ pip3.12 install package

• Preamble (contains a series of metadata items that are used in the Body)
• Body (contains the main part of the instructions)

Prerequisites

• A SPEC file for the RPM exists. For more information, see SPEC file description for a Python package.

Prerequisites

• Some of the interpreter directives in your Python scripts cause a build error.

Procedure

• To modify interpreter directives, complete one of the following tasks:

  • Use the following macro in the %prep section of your SPEC file:

    # %py3_shebang_fix SCRIPTNAME …​

    SCRIPTNAME can be any file, directory, or a list of files and directories.

    As a result, all listed files and all .py files in listed directories will have their interpreter directives modified to point to %{python3}. Existing flags from the original interpreter directive will be preserved and additional flags defined in the %{py3_shebang_flags} macro will be added. You can redefine the %{py3_shebang_flags} macro in your SPEC file to change the flags that will be added.

  • Apply the pathfix.py script from the python3-devel package:

    # pathfix.py -pn -i %{python3} PATH …​

    You can specify multiple paths. If a PATH is a directory, pathfix.py recursively scans for any Python scripts matching the pattern ^[a-zA-Z0-9_]+\.py$, not only those with an ambiguous interpreter directive. Add the command above to the %prep section or at the end of the %install section.

  • Modify the packaged Python scripts so that they conform to the expected format. For this purpose, you can use the pathfix.py script outside the RPM build process, too. When running pathfix.py outside an RPM build, replace %{python3} from the preceding example with a path for the interpreter directive, such as /usr/bin/python3 or /usr/bin/python3.11.

Procedure

• To install Tcl, use:

  # dnf install tcl

Verification

• To verify the Tcl version installed on your system, run the interpreter tclsh.

  $ tclsh

• In the interpreter run this command:

  % info patchlevel
  8.6

• You can exit the interpreter interface by pressing Ctrl+C

Procedure

• To install Tk, use:

  # dnf install tk

Verification

• To verify the Tk version installed on your system, run the window shell wish. You need to be running a graphical display.

  $ wish

• In the shell run this command:

  % puts $tk_version
  8.6

• You can exit the interpreter interface by pressing Ctrl+C

Procedure

• To install PHP 8.0, enter:

  # dnf install php

• To install the php:8.1 or php:8.2 module stream with the default profile, enter for example:

  # dnf module install php:8.1

• To install a specific profile of the php:8.1 or php:8.2 module stream, use for example:

  # dnf module install php:8.1/profile

• The available profiles for the php:8.1 and php:8.2 module streams are:

  • common - The default profile for server-side scripting using a web server. It includes the most widely used extensions.
  • minimal - This profile installs only the command line for scripting with PHP without using a web server.
  • devel - This profile includes packages from the common profile and additional packages for development purposes.

• For example, to install PHP 8.1 for use without a web server, use:

  # dnf module install php:8.1/minimal

Prerequisites

• The PHP scripting language is installed on your system.

• httpd(8) - The manual page for the httpd service containing the complete list of its command-line options.
• httpd.conf(5) - The manual page for httpd configuration, describing the structure and location of the httpd configuration files.
• nginx(8) - The manual page for the nginx web server containing the complete list of its command-line options and list of signals.
• php-fpm(8) - The manual page for PHP FPM describing the complete list of its command-line options and configuration files.