Python distutils silent install

Windows will concatenate User variables after System variables, which may cause unexpected results when modifying PATH. Besides using the automatically created start menu entry for the Python interpreter, you might want to start Python in the command prompt. The installer has an option to set that up for you.

This allows you to type python to run the interpreter, and pip for the package installer. Thus, you can also execute your scripts with command line options, see Command line documentation.

You need to set your PATH environment variable to include the directory of your Python installation, delimited by a semicolon from other entries. An example variable could look like this assuming the first two entries already existed :.

Python uses it for the default encoding of text files e. If you have any Python 3. The filesystem encoding see PEP for details. The Python launcher for Windows is a utility which aids in locating and executing of different Python versions. It allows scripts or the command-line to indicate a preference for a specific Python version, and will locate and execute that version.

It will prefer per-user installations over system-wide ones, and orders by language version rather than using the most recently installed version. The launcher was originally specified in PEP System-wide installations of Python 3. The launcher is compatible with all available versions of Python, so it does not matter which version is installed. To check that the launcher is available, execute the following command in Command Prompt:.

You should find that the latest version of Python you have installed is started - it can be exited as normal, and any additional command-line arguments specified will be sent directly to Python.

If you have multiple versions of Python installed e. Per-user installations of Python do not add the launcher to PATH unless the option was selected on installation. To run the global interpreter, either deactivate the virtual environment, or explicitly specify the global Python version. You should notice the version number of your latest Python 2.

Now try changing the first line to be:. Re-executing the command should now print the latest Python 3. As with the above command-line examples, you can specify a more explicit version qualifier. Assuming you have Python 2. This is for backward compatibility and for compatibility with Unix, where the command python typically refers to Python 2.

The launcher should have been associated with Python files i. This means that when you double-click on one of these files from Windows explorer the launcher will be used, and therefore you can use the same facilities described above to have the script specify the version which should be used.

The key benefit of this is that a single launcher can support multiple Python versions at the same time depending on the contents of the first line. If the first line of a script file starts with! Linux and other Unix like operating systems have native support for such lines and they are commonly used on such systems to indicate how a script should be executed.

This launcher allows the same facilities to be used with Python scripts on Windows and the examples above demonstrate their use. The supported virtual commands are:. The default Python will be located and used.

As many Python scripts written to work on Unix will already have this line, you should find these scripts can be used by the launcher without modification. Any of the above virtual commands can be suffixed with an explicit version either just the major version, or the major and minor version. New in version 3. Furthermore it is possible to specify a major and architecture without minor i. The shebang lines can also specify additional options to be passed to the Python interpreter.

For example, if you have a shebang line:. Then Python will be started with the -v option. The same. In some cases, a version qualifier can be included in a command to dictate which version of Python will be used by the command. For example, a shebang line of! If no such option is found, the launcher will enumerate the installed Python versions and use the latest minor release found for the major version, which is likely, although not guaranteed, to be the most recently installed version in that family.

On bit Windows with both bit and bit implementations of the same major. This will be true for both bit and bit implementations of the launcher - a bit launcher will prefer to execute a bit Python installation of the specified version if available. This is so the behavior of the launcher can be predicted knowing only what versions are installed on the PC and without regard to the order in which they were installed i.

If no relevant options are set, the commands python and python2 will use the latest Python 2. The commands python3. In addition to environment variables, the same settings can be configured in the. INI file used by the launcher. The contents of an environment variable will override things specified in the INI file. While this information manages to be simultaneously verbose and terse, it should allow you to see what versions of Python were located, why a particular version was chosen and the exact command-line used to execute the target Python.

Python usually stores its library and thereby your site-packages folder in the installation directory. To completely override sys. The file based on the DLL name overrides the one based on the executable, which allows paths to be restricted for any program loading the runtime if desired.

When the file exists, all registry and environment variables are ignored, isolated mode is enabled, and site is not imported unless one line in the file specifies import site.

Blank paths and lines starting with are ignored. Each path may be absolute or relative to the location of the file. Import statements other than to site are not permitted, and arbitrary code cannot be specified. Note that. When no. Subkeys which have semicolon-delimited path strings as their default value will cause each path to be added to sys.

If a Python home is found, the relevant sub-directories added to sys. Otherwise, the core Python path is constructed from the PythonPath stored in the registry.

If a pyvenv. How do I clear this cache? I have tried python setup. Improve this question. Dan Dan 2, 3 3 gold badges 17 17 silver badges 25 25 bronze badges. Add a comment. Active Oldest Votes. Just delete under site-packages path any file related to it, you may find sometimes more than one version or some files packaged as zip files or run the following command python setup. Recompile and install again. Summary : python setup. Improve this answer.

Dhia Dhia 8, 11 11 gold badges 52 52 silver badges 65 65 bronze badges. Refer to the quick recommendations section in the Python Packaging User Guide for more information. In Python 2. This provided Linux distro maintainers with a standard way of converting Python projects into Linux distro packages, and system administrators with a standard way of installing them directly onto target systems.

In the many years since Python 2. If you download a module source distribution, you can tell pretty quickly if it was packaged and distributed in the standard way, i. Next, the archive will unpack into a similarly-named directory: foo Additionally, the distribution will contain a setup script setup. Or rather, the above command is everything you need to get out of this manual. As described in section Distutils based source distributions , building and installing a module distribution using the Distutils is usually one simple command to run from a terminal:.

You should always run the setup command from the distribution root directory, i. Then, open a command prompt window and run:. Running setup. If you prefer to work incrementally—especially useful if you want to customize the build process, or if things are going wrong—you can use the setup script to do one thing at a time.

This is particularly helpful when the build and install will be done by different users—for example, you might want to build a module distribution and hand it off to a system administrator for installation or do it yourself, with super-user privileges. For example, you can build everything in one step, and then install everything in a second step, by invoking the setup script twice:.

If you do this, you will notice that running the install command first runs the build command, which—in this case—quickly notices that it has nothing to do, since everything in the build directory is up-to-date.

As implied above, the build command is responsible for putting the files to install into a build directory. For example:. Or you could do this permanently with a directive in your system or personal Distutils configuration file; see section Distutils Configuration Files. In that case, the temp. In either case, the lib or lib.

In the future, more directories will be added to handle Python scripts, documentation, binary executables, and whatever else is needed to handle the job of installing Python modules and applications. They are always the same under Windows, and very often the same under Unix and macOS. You can find out what your Python installation uses for prefix and exec-prefix by running Python in interactive mode and typing a few simple commands.

Under Unix, just type python at the shell prompt. Once the interpreter is started, you type Python code at the prompt. For example, on my Linux system, I type the three Python statements shown below, and get the output as shown, to find out my prefix and exec-prefix :.

A few other placeholders are used in this document: X. Y stands for the version of Python, for example 3. Dots and capitalization are important in the paths; for example, a value that uses python3. If you want to customize your installation directories more heavily, see section Custom Installation on custom installations.

Often, it is necessary or desirable to install modules to a location other than the standard location for third-party Python modules. For example, on a Unix system you might not have permission to write to the standard third-party module directory. Or you might wish to try out a module before making it a standard part of your local Python installation. This is especially true when upgrading a distribution already present: you want to make sure your existing base of scripts still works with the new version before actually upgrading.

The Distutils install command is designed to make installing module distributions to an alternate location simple and painless. The basic idea is that you supply a base directory for the installation, and the install command picks a set of directories called an installation scheme under this base directory in which to install files.

The details differ across platforms, so read whichever of the following sections applies to you. It is enabled with a simple option:. Files will be installed into subdirectories of site. This scheme installs pure Python modules and extension modules in the same location also known as site. Same as Ganesh, has no installation candidate Ubuntu It is possible to install it for the very specific version.

I tried it with sudo apt-get install python3. Show 2 more comments. Ben Amos Ben Amos 1, 13 13 silver badges 18 18 bronze badges. What is the difference between python3-distutils-extra on Ubuntu Per packages.

Why installing distutils-extra would succeed where installing distutils fails, I cannot say. Mohammad Heydari Mohammad Heydari 2, 2 2 gold badges 21 21 silver badges 32 32 bronze badges. Manoj Govindan Manoj Govindan Can't do that. Its a VPS server, I don't have sudo privileges. I'm thinking of installing a local python. Either that, or I find distutils archive for python 2.

If you are installing local Python switch to 2. All Python have included distutils since Here it looks like one of the stupid OSes that split the standard library into arbitrary python and python-devel packages. Duncan Duncan Thanks for the reply, but it didn't work. The basic python installation is pretty screwed up I guess. I'll go with local install. Thanks a lot anyway.