A default value for the path is configured into the Python binary when the interpreter is built. You can determine the path by importing the sys module and printing the value of sys. The null string in sys. There are several different ways to add the directory. Path configuration files have an extension of. Because the new paths are appended to sys.
See the documentation of the site module for more information. A slightly less convenient way is to edit the site. So you could simply edit site. However, if you reinstall the same major version of Python perhaps when upgrading from 2.
There are two environment variables that can modify sys. Note that directories must exist in order to be added to sys. Finally, sys. As mentioned above, you can use Distutils configuration files to record personal or site preferences for any Distutils options. That is, any option to any command can be stored in one of two or three depending on your platform configuration files, which will be consulted before the command-line is parsed.
This means that configuration files will override default values, and the command-line will in turn override configuration files. The names and locations of the configuration files vary slightly across platforms. On Unix and macOS, the three configuration files in the order they are processed are:. Strictly speaking, the system-wide configuration file lives in the directory where the Distutils are installed; under Python 1.
For Python 1. This is done by the os. See also note 1. Under Python 1. The Distutils configuration files all have the same syntax. The config files are grouped into sections. There is one section for each Distutils command, plus a global section for global options that affect every command.
For example, the following is a complete config file that just forces all commands to run quietly by default:. If this is installed as the system config file, it will affect all processing of any Python module distribution by any user on the current system. If it is installed as your personal config file on systems that support them , it will affect only module distributions processed by you.
And if it is used as the setup. Including a particular command in config files has no such implication; it only means that if the command is run, the options in the config file will apply. Or if other commands that derive values from it are run, they will use the values in the config file. You can find out the complete list of options for any command using the --help option, e.
Whenever possible, the Distutils try to use the configuration information made available by the Python interpreter used to run the setup.
For example, the same compiler and linker flags used to compile Python will also be used for compiling extensions. Usually this will work well, but in complicated situations this might be inappropriate. This section discusses how to override the usual Distutils behaviour. In the most general case, the extension author might have foreseen that compiling the extensions would be complicated, and provided a Setup file for you to edit. This will likely only be done if the module distribution contains many separate extension modules, or if they often require elaborate sets of compiler flags in order to work.
A Setup file, if present, is parsed in order to get a list of extensions to build. Each line in a Setup describes a single module. Lines have the following structure:. Filenames ending in. If a particular platform requires a special library on your platform, you can add it by editing the Setup file and running python setup.
For example, if the module defined by the line. Arbitrary switches intended for the compiler or the linker can be supplied with the -Xcompiler arg and -Xlinker arg options:. The next option after -Xcompiler and -Xlinker will be appended to the proper command line, so in the above example the compiler will be passed the -o32 option, and the linker will be passed -shared. You can do this as follows:.
The coff2omf program comes with the Borland compiler. The file python If your extension uses other libraries zlib, … you have to convert them too. How does Distutils manage to use these libraries with their changed names?
If the extension needs a library eg. Not all extensions can be built with MinGW or Cygwin, but many can. These compilers require some special libraries. But when I check locations of some of python packages, locations are different.
There are 3 locations. Why is that? How to get all packages list? When I run pip3 list opencv package not showing. Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Python packages locations in Ubuntu Ask Question. Asked 2 years, 5 months ago.
If the checkbox is selected, the packages will be installed into the specified directory. This option is not available for Conda environments.
Select the target package and click Install Package. Click Uninstall. The selected packages are removed from disk. PyCharm smartly tracks the status of packages and recognizes outdated versions by showing the number of the currently installed package version column Version , and the latest available version column Latest version. When a newer version of a package is detected, PyCharm marks it with the arrow sign and suggests to upgrade it.
By default, the Latest version column shows only stable versions of the packages. If you want to extend the scope of the latest available versions to any pre-release versions such as beta or release candidate , click Show early releases.
Click Upgrade. If you're accustomed to installing packages from the commands line , you can proceed with your workflow using the Terminal. Create a new virtual environment and install packages that you want to be used in other projects.
Then you can specify this virtual environment as a Python interpreter for the target project and all the needed packages will be available. In the Terminal window execute the following command:. Then add the created requirements. Install, uninstall, and upgrade packages PyCharm provides methods for installing, uninstalling, and upgrading Python packages for a particular Python interpreter.
Manage packages in the Python Packages tool window The Python Packages tool window provides the quickest and neat way to preview and install packages for the currently selected Python interpreter.
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