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PIP3-LOCK(1) pip PIP3-LOCK(1)

NAME

pip3-lock - description of pip3 lock command

DESCRIPTION

EXPERIMENTAL - Lock packages and their dependencies from:

  • PyPI (and other indexes) using requirement specifiers.
  • VCS project urls.
  • Local project directories.
  • Local or remote source archives.

pip also supports locking from "requirements files", which provide an easy way to specify a whole environment to be installed.

The generated lock file is only guaranteed to be valid for the current python version and platform.

USAGE

python -m pip lock [options] [-e] <local project path> ...
python -m pip lock [options] <requirement specifier> [package-index-options] ...
python -m pip lock [options] -r <requirements file> [package-index-options] ...
python -m pip lock [options] <archive url/path> ...


OPTIONS

Lock file name (default=pylock.toml). Use - for stdout.

(environment variable: PIP_OUTPUT)


Install from the given requirements file. The file or URL can be in pip's requirements.txt format, or pylock.toml format. pylock.toml support is experimental. This option can be used multiple times.

(environment variable: PIP_REQUIREMENT)


Install dependencies of the given script file as defined by PEP 723 inline metadata.

(environment variable: PIP_REQUIREMENTS_FROM_SCRIPT)


Constrain versions using the given constraints file. This option can be used multiple times.

(environment variable: PIP_CONSTRAINT)


Constrain build dependencies using the given constraints file. This option can be used multiple times.

(environment variable: PIP_BUILD_CONSTRAINT)


Don't install package dependencies.

(environment variable: PIP_NO_DEPS, PIP_NO_DEPENDENCIES)


Install a project in editable mode (i.e. setuptools "develop mode") from a local project path or a VCS url.

(environment variable: PIP_EDITABLE)


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".

(environment variable: PIP_SRC, PIP_SOURCE, PIP_SOURCE_DIR, PIP_SOURCE_DIRECTORY)


Ignore the Requires-Python information.

(environment variable: PIP_IGNORE_REQUIRES_PYTHON)


Disable isolation when building a modern source distribution. Build dependencies specified by PEP 518 must be already installed if this option is used.

(environment variable: PIP_NO_BUILD_ISOLATION)


Check the build dependencies.

(environment variable: PIP_CHECK_BUILD_DEPENDENCIES)


Configuration settings to be passed to the build backend. Settings take the form KEY=VALUE. Use multiple --config-settings options to pass multiple keys to the backend.

(environment variable: PIP_CONFIG_SETTINGS)


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.

(environment variable: PIP_REQUIRE_HASHES)


Specify whether the progress bar should be used. In 'auto' mode, --quiet will suppress all progress bars. [auto, on, off, raw] (default: auto)

(environment variable: PIP_PROGRESS_BAR)


Install a named dependency-group from a "pyproject.toml" file. If a path is given, the name of the file must be "pyproject.toml". Defaults to using "pyproject.toml" in the current directory.

(environment variable: PIP_GROUP)


Don't clean up build directories.

(environment variable: PIP_NO_CLEAN)


Author

pip developers

Copyright

The pip developers

June 2, 2026 26.1