python_requirement

A Python requirement installable by pip.

This target is useful when you want to declare Python requirements inline in a BUILD file. If you have a requirements.txt file already, you can instead use the macro python_requirements() to convert each requirement into a python_requirement() target automatically. For Poetry, use poetry_requirements().

See Third-party dependencies.

dependencies

type: Iterable[str] | None
default: None

Addresses to other targets that this target depends on, e.g. ['helloworld/subdir:lib'].

Alternatively, you may include file names. Pants will find which target owns that file, and create a new target from that which only includes the file in its sources field. For files relative to the current BUILD file, prefix with ./; otherwise, put the full path, e.g. ['./sibling.txt', 'resources/demo.json'].

You may exclude dependencies by prefixing with !, e.g. ['!helloworld/subdir:lib', '!./sibling.txt']. Ignores are intended for false positives with dependency inference; otherwise, simply leave off the dependency from the BUILD file.

description

type: str | None
default: None

A human-readable description of the target.

Use ./pants list --documented :: to see all targets with descriptions.

modules

type: Iterable[str] | None
default: None

The modules this requirement provides (used for dependency inference).

For example, the requirement setuptools provides ["setuptools", "pkg_resources", "easy_install"].

Usually you can leave this field off. If unspecified, Pants will first look at the default module mapping (https://github.com/pantsbuild/pants/blob/release_2.8.0rc6/src/python/pants/backend/python/dependency_inference/default_module_mapping.py), and then will default to the normalized project name. For example, the requirement Django would default to the module django.

Mutually exclusive with the type_stub_modules field.

requirements

type: Iterable[str]
required

A pip-style requirement string, e.g. ["Django==3.2.8"].

You can specify multiple requirements for the same project in order to use environment markers, such as ["foo>=1.2,<1.3 ; python_version>'3.6'", "foo==0.9 ; python_version<'3'"].

If the requirement depends on some other requirement to work, such as needing setuptools to be built, use the dependencies field instead.

tags

type: Iterable[str] | None
default: None

Arbitrary strings to describe a target.

For example, you may tag some test targets with 'integration_test' so that you could run ./pants --tag='integration_test' test :: to only run on targets with that tag.

type_stub_modules

type: Iterable[str] | None
default: None

The modules this requirement provides if the requirement is a type stub (used for dependency inference).

For example, the requirement types-requests provides ["requests"].

Usually you can leave this field off. If unspecified, Pants will first look at the default module mapping (https://github.com/pantsbuild/pants/blob/release_2.8.0rc6/src/python/pants/backend/python/dependency_inference/default_module_mapping.py). If not found and the requirement name starts with types- or stubs-, or ends with -types or -stubs, will default to that requirement name without the prefix/suffix. For example, types-requests would default to requests. Otherwise, will be treated like a normal requirement (see the modules field).

Mutually exclusive with the modules field.


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