Creating a file to download all modules python

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.

The advantage of using this scheme compared to the other ones described below is that the user site-packages directory is under normal conditions always included in sys. This scheme can be used by anyone, regardless of the operating system they are installing for. The --home option defines the installation base directory. Files are installed to the following directories under the installation base as follows:. However, there are at least two known cases where the prefix scheme will be useful. This can be done with.

This could be done with. In either case, the --prefix option defines the installation base, and the --exec-prefix option defines the platform-specific installation base, which is used for platform-specific files.

Currently, this just means non-pure module distributions, but could be expanded to C libraries, binary executables, etc. If --exec-prefix is not supplied, it defaults to --prefix. Files are installed as follows:. There is no requirement that --prefix or --exec-prefix actually point to an alternate Python installation; if the directories listed above do not already exist, they are created at installation time. Incidentally, the real reason the prefix scheme is important is simply that a standard Unix installation uses the prefix scheme, but with --prefix and --exec-prefix supplied by Python itself as sys.

Note that installing extensions to an alternate Python installation has no effect on how those extensions are built: in particular, the Python header files Python.

It is your responsibility to ensure that the interpreter used to run extensions installed in this way is compatible with the interpreter used to build them.

The best way to do this is to ensure that the two interpreters are the same version of Python possibly different builds, or possibly copies of the same build. The installation base is defined by the --prefix option; the --exec-prefix option is not supported under Windows, which means that pure Python modules and extension modules are installed into the same location. You might want to tweak just one or two directories while keeping everything under the same base directory, or you might want to completely redefine the installation scheme.

To create a custom installation scheme, you start with one of the alternate schemes and override some of the installation directories used for the various types of files, using these options:. These override options can be relative, absolute, or explicitly defined in terms of one of the installation base directories.

As you might expect, you can override this directory with the --install-scripts option; in this case, it makes most sense to supply a relative path, which will be interpreted relative to the installation base directory your home directory, in this case :. If you maintain Python on Windows, you might want third-party modules to live in a subdirectory of prefix , rather than right in prefix itself.

This is almost as easy as customizing the script installation directory—you just have to remember that there are two types of modules to worry about, Python and extension modules, which can conveniently be both controlled by one option:. The specified installation directory is relative to prefix. If you want to define an entire installation scheme, you just have to supply all of the installation directory options.

The recommended way to do this is to supply relative paths; for example, if you want to maintain all Python module-related files under python in your home directory, and you want a separate directory for each platform that you use your home directory from, you might define the following installation scheme:. Obviously, specifying the entire installation scheme every time you install a new module distribution would be very tedious.

Thus, you can put these options into your Distutils config file see section Distutils Configuration Files :. Note that these two are not equivalent if you supply a different installation base directory when you run the setup script. For example,. These are Distutils configuration variables, which bear a strong resemblance to environment variables. Easy Normal Medium Hard Expert. Writing code in comment?

Please use ide. Load Comments. What's New. Most popular in Python. Python Split string into list of characters set add in python Check if element exists in list in Python. More related articles in Python. We use cookies to ensure you have the best browsing experience on our website.

Open the Environment Variables dialog. This can be done by searching up "system variables" and clicking on the first option, then clicking on the Environment Variables… button. Add the Python path you just copied to the user 'Path' variable. You may need to restart your computer after this step. After following these steps, you will have a local Python installation with full pip functionality that you can use from a command shell.

Part 3. Research what kind of modules you want to install on your computer. There are many, many modules out there that all do great things. Look up the package name for the module you want to install. Go to pypi. The name of the package that contains it as well as the command needed to install it are at the top of the page.

Open the command shell on your computer and run the command from the PyPI page. This will initiate the installation process. Remember to close all instances of Python that are running when you do this. Part 4. More often than not, the module name for importing is the same as the package name. You can always use the documentation to verify this. Add some other code as you need to.

Execute your code in your editing environment. If no errors occur, congratulations! Creating a Source Distribution. Distutils Examples. Obviously, no one person will be able to create built distributions for every platform under the sun, so the Distutils are designed to enable module developers to concentrate on their specialty—writing code and creating source distributions—while an intermediary species called packagers springs up to turn source distributions into built distributions for as many platforms as there are packagers.

Regardless of who they are, a packager uses the setup script and the bdist command family to generate built distributions. Thus, the above command on a Unix system creates Distutils The bdist command has a --formats option, similar to the sdist command, which you can use to select the types of built distribution to generate: for example,.

Changed in version 3. The bdist sub-commands, and the formats generated by each, are:. If one of these or any of the other RPM-based Linux distributions is your usual environment, creating RPM packages for other users of that same distribution is trivial. Depending on the complexity of your module distribution and differences between Linux distributions, you may also be able to create RPMs that work on different RPM-based distributions.

The former allows you to specify RPM-specific options; the latter allows you to easily specify multiple formats in one run. Creating RPM packages is driven by a. Various options and sections in the.