The MyPy Python type checker (http://mypy-lang.org/).
Don't use MyPy when running
Arguments to pass directly to MyPy, e.g.
--mypy-args='--python-version 3.7 --disallow-any-expr'.
If true, export a virtual environment with MyPy when running
This can be useful, for example, with IDE integrations to point your editor to the tool's binary.
Requirement string for the tool.
--mypy-extra-requirements="['<str>', '<str>', ...]"
Any additional requirement strings to use with the tool. This is useful if the tool allows you to install plugins or if you need to constrain a dependency to a certain version.
--mypy-interpreter-constraints="['<str>', '<str>', ...]"
[ "CPython>=3.7,<4" ]
Python interpreter constraints for this tool.
Path to a lockfile used for installing the tool.
Set to the string
<default> to use a lockfile provided by Pants, so long as you have not changed the
--extra-requirements options, and the tool's interpreter constraints are compatible with the default. Pants will error or warn if the lockfile is not compatible (controlled by
[python].invalid_lockfile_behavior). See https://github.com/pantsbuild/pants/blob/release_2.12.1/src/python/pants/backend/python/typecheck/mypy/mypy.lock for the default lockfile contents.
Set to the string
<none> to opt out of using a lockfile. We do not recommend this, though, as lockfiles are essential for reproducible builds.
To use a custom lockfile, set this option to a file path relative to the build root, then run
./pants generate-lockfiles --resolve=mypy.
As explained at Third-party dependencies, lockfile generation via
generate-lockfiles does not always work and you may want to manually generate the lockfile. You will want to set
[python].invalid_lockfile_behavior = 'ignore' so that Pants does not complain about missing lockfile headers.
The console script for the tool. Using this option is generally preferable to (and mutually exclusive with) specifying an --entry-point since console script names have a higher expectation of staying stable across releases of the tool. Usually, you will not want to change this from the default.
The entry point for the tool. Generally you only want to use this option if the tool does not offer a --console-script (which this option is mutually exclusive with). Usually, you will not want to change this from the default.
Path to a config file understood by MyPy (https://mypy.readthedocs.io/en/stable/config_file.html).
Setting this option will disable
[mypy].config_discovery. Use this option if the config is located in a non-standard location.
If true, Pants will include any relevant config files during runs (
[mypy].config instead if your config is in a non-standard location.
--mypy-source-plugins="[<target_option>, <target_option>, ...]"
An optional list of
python_sources target addresses to load first-party plugins.
You must also set
plugins = path.to.module in your
mypy.ini, and set the
[mypy].config option in your
To instead load third-party plugins, set the option
[mypy].extra_requirements and set the
plugins option in
mypy.ini. Tip: it's often helpful to define a dedicated 'resolve' via
[python].resolves for your MyPy plugins such as 'mypy-plugins' so that the third-party requirements used by your plugin, like
mypy, do not mix with the rest of your project. Read that option's help message for more info on resolves.
Extra type stub requirements to install when running MyPy.
Normally, type stubs can be installed as typical requirements, such as putting them in
requirements.txt or using a
python_requirement target. Alternatively, you can use this option so that the dependencies are solely used when running MyPy and are not runtime dependencies.
Expects a list of pip-style requirement strings, like
Updated about 1 year ago