When you’re tweaking Python’s package manager PIP, make sure you know these.
Only install specified package itself.
Install to user’s site-packages, on MacOS that’s
When any install option is specified, wheel(binary package) will be disabled, and setuptools will be used, and the entry point script will be placed to specified place. If not specified, the script will be put at corresponding bin folder, for example, if I specify
/Users/foo/Library/Python/2.7/, the script will be put at
/Users/foo/Library/Python/2.7/bin/, by default the script files will be placed under System Python directory’s
How to use –install-option meanwhile wheel?
Just put options under
global section instead of
install section in
pip.conf, or use them in command line, which will achieve the same result without disabling wheel.
What’s difference between –force-reinstall and -I, –ignore-installed?
-I will really reinstall all packages forcefully,
--force-reinstall will only take effect with
Install to non-default location
Different between egg-info and dist-info.
egg-info is generated when using egg (non-binary), dist-info is generated when using wheel or other PEP376-compliant tools.
Egg vs Wheel
Below is the
pip help install output
Usage: pip install [options] <requirement specifier> [package-index-options] ... pip install [options] -r <requirements file> [package-index-options] ... pip install [options] [-e] <vcs project url> ... pip install [options] [-e] <local project path> ... pip install [options] <archive url/path> ... Description: Install packages from: - PyPI (and other indexes) using requirement specifiers. - VCS project urls. - Local project directories. - Local or remote source archives. pip also supports installing from "requirements files", which provide an easy way to specify a whole environment to be installed. Install Options: -c, --constraint <file> Constrain versions using the given constraints file. This option can be used multiple times. -e, --editable <path/url> Install a project in editable mode (i.e. setuptools "develop mode") from a local project path or a VCS url. -r, --requirement <file> Install from the given requirements file. This option can be used multiple times. -b, --build <dir> Directory to unpack packages into and build in. -t, --target <dir> Install packages into <dir>. By default this will not replace existing files/folders in <dir>. Use --upgrade to replace existing packages in <dir> with new versions. -d, --download <dir> Download packages into <dir> instead of installing them, regardless of what's already installed. --src <dir> Directory to check out editable projects into. The default in a virtualenv is "<venv path>/src". The default for global installs is "<current dir>/src". -U, --upgrade Upgrade all specified packages to the newest available version. The handling of dependencies depends on the upgrade-strategy used. --upgrade-strategy <upgrade_strategy> Determines how dependency upgrading should be handled. "eager" - dependencies are upgraded regardless of whether the currently installed version satisfies the requirements of the upgraded package(s). "only-if- needed" - are upgraded only when they do not satisfy the requirements of the upgraded package(s). --force-reinstall When upgrading, reinstall all packages even if they are already up-to-date. -I, --ignore-installed Ignore the installed packages (reinstalling instead). --ignore-requires-python Ignore the Requires-Python information. --no-deps Don't install package dependencies. --install-option <options> Extra arguments to be supplied to the setup.py install command (use like --install-option="--install- scripts=/usr/local/bin"). Use multiple --install-option options to pass multiple options to setup.py install. If you are using an option with a directory path, be sure to use absolute path. --global-option <options> Extra global options to be supplied to the setup.py call before the install command. --user Install to the Python user install directory for your platform. Typically ~/.local/, or %APPDATA%\Python on Windows. (See the Python documentation for site.USER_BASE for full details.) --egg Install packages as eggs, not 'flat', like pip normally does. This option is not about installing *from* eggs. (WARNING: Because this option overrides pip's normal install logic, requirements files may not behave as expected.) --root <dir> Install everything relative to this alternate root directory. --prefix <dir> Installation prefix where lib, bin and other top-level folders are placed --compile Compile py files to pyc --no-compile Do not compile py files to pyc --no-use-wheel Do not Find and prefer wheel archives when searching indexes and find-links locations. DEPRECATED in favour of --no-binary. --no-binary <format_control> Do not use binary packages. Can be supplied multiple times, and each time adds to the existing value. Accepts either :all: to disable all binary packages, :none: to empty the set, or one or more package names with commas between them. Note that some packages are tricky to compile and may fail to install when this option is used on them. --only-binary <format_control> Do not use source packages. Can be supplied multiple times, and each time adds to the existing value. Accepts either :all: to disable all source packages, :none: to empty the set, or one or more package names with commas between them. Packages without binary distributions will fail to install when this option is used on them. --pre Include pre-release and development versions. By default, pip only finds stable versions. --no-clean Don't clean up build directories. --require-hashes Require a hash to check each requirement against, for repeatable installs. This option is implied when any package in a requirements file has a --hash option. Package Index Options (including deprecated options): -i, --index-url <url> Base URL of Python Package Index (default https://pypi.python.org/simple). This should point to a repository compliant with PEP 503 (the simple repository API) or a local directory laid out in the same format. --extra-index-url <url> Extra URLs of package indexes to use in addition to --index-url. Should follow the same rules as --index- url. --no-index Ignore package index (only looking at --find-links URLs instead). -f, --find-links <url> If a url or path to an html file, then parse for links to archives. If a local path or file:// url that's a directory, then look for archives in the directory listing. --process-dependency-links Enable the processing of dependency links. General Options: -h, --help Show help. --isolated Run pip in an isolated mode, ignoring environment variables and user configuration. -v, --verbose Give more output. Option is additive, and can be used up to 3 times. -V, --version Show version and exit. -q, --quiet Give less output. Option is additive, and can be used up to 3 times (corresponding to WARNING, ERROR, and CRITICAL logging levels). --log <path> Path to a verbose appending log. --proxy <proxy> Specify a proxy in the form [user:passwd@]proxy.server:port. --retries <retries> Maximum number of retries each connection should attempt (default 5 times). --timeout <sec> Set the socket timeout (default 15 seconds). --exists-action <action> Default action when a path already exists: (s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort. --trusted-host <hostname> Mark this host as trusted, even though it does not have valid or any HTTPS. --cert <path> Path to alternate CA bundle. --client-cert <path> Path to SSL client certificate, a single file containing the private key and the certificate in PEM format. --cache-dir <dir> Store the cache data in <dir>. --no-cache-dir Disable the cache. --disable-pip-version-check Don't periodically check PyPI to determine whether a new version of pip is available for download. Implied with --no-index.