Metadata-Version: 2.1
Name: mypy-upgrade
Version: 0.0.1a3
Summary: automatic error suppression for mypy
Project-URL: Documentation, https://github.com/ugognw/mypy-upgrade#readme
Project-URL: Issues, https://github.com/ugognw/mypy-upgrade/issues
Project-URL: Source, https://github.com/ugognw/mypy-upgrade
Author-email: Ugochukwu Nwosu <ugognw@gmail.com>
License-Expression: MIT
License-File: AUTHORS.md
License-File: LICENSE.txt
Keywords: type checking
Classifier: Development Status :: 3 - Alpha
Classifier: Intended Audience :: Developers
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Topic :: Software Development
Requires-Python: >=3.7
Requires-Dist: typing-extensions; python_version < '3.8'
Description-Content-Type: text/markdown

# `mypy-upgrade`

[![PyPI - Version](https://img.shields.io/pypi/v/mypy-upgrade.svg)](https://pypi.org/project/mypy-upgrade)
[![PyPI - Python Version](https://img.shields.io/pypi/pyversions/mypy-upgrade.svg)](https://pypi.org/project/mypy-upgrade)
[![Hatch project](https://img.shields.io/badge/%F0%9F%A5%9A-Hatch-4051b5.svg)](https://github.com/pypa/hatch)
[![linting - Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/charliermarsh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
[![code style - Black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
[![types - Mypy](https://img.shields.io/badge/types-Mypy-blue.svg)](https://github.com/python/mypy)
[![License - MIT](https://img.shields.io/badge/license-MIT-9400d3.svg)](https://spdx.org/licenses/)

-----

**Table of Contents**

- [What is `mypy-upgrade`?](#what-is-mypy-upgrade)
- [Features](#features)
- [Basic Usage](#basic-usage)
- [Command-Line Options](#command-line-options)
- [Quick Start](#quick-start)
- [Known Bugs](#known-bugs)
- [Similar Projects](#similar-projects)

## What is `mypy-upgrade`?

`mypy-upgrade` is a command-line utility that provides automatic error
suppression for [`mypy`](http://mypy.readthedocs.io/) (analogous to [`pyre-upgrade`](https://pyre-check.org/docs/types-in-python/#upgrade) and [`pylint-silent`](https://github.com/udifuchs/pylint-silent/)).

Given a type checking report from `mypy`,
`mypy-upgrade` will silence the listed errors using error suppression
comments. For example, with the following output from mypy:

    package/subpackage/module.py:13: error: Incompatible default for argument "filename" (default has type "None", argument has type "str") [assignment]

`mypy-upgrade` will place a `# type: ignore[assignment]` comment at the
end of line 13 in `package/subpackage/module.py`. If error codes are not
present in the `mypy` report (e.g., the `hide-error-codes` flag is set when
`mypy` was invoked), then a non-specific `# type: ignore` comment will be
added instead.

> :warning: **Warning:** `mypy-check` **must** be run in the same directory
> that `mypy` was run.

## Features

* Removal of unused `type: ignore` comments

* Optional inclusion of `mypy` error description messages

* Support for suppressing multiple mypy errors per-line

* Preservation of existing in-line comments

* Replacement of blanket `type: ignore` comments with error code-specific
comments

## Basic Usage

There are two idioms for invocation. To silence all errors in a package, one
can:

1. pipe `mypy`'s output directly to `mypy-upgrade`

        mypy --strict -p my_package | mypy-upgrade

2. create a `mypy` type checking report text file

        mypy --strict -p my_package > mypy_report.txt

    and then pass the file to `mypy-upgrade`

        mypy-upgrade --report mypy_report.txt

> :memo: **Note:** To ensure desired behaviour, packages and modules must be
passed using their fully qualified names (e.g., `my_package.my_module`).

## Command-Line Options

You may want to include the error descriptions provided by `mypy` in the
suppression comments so that you can fix them later. You can do so using
the `-d` (or `--with-descriptions`) option

    mypy-upgrade --report mypy_report.txt -d -p MY_PACKAGE

To selectively silence errors in packages and modules, use the `-p`
(`--package`) and `-m` (`--module`) options, respectively:

Similarly, to selectively silence errors in files and directories,
pass them in as positional arguments:

    mypy-upgrade --report mypy_report.txt path/to/my_package/ path/to/a/module.py

For a full list of all options and their descriptions, run

    mypy-upgrade --help

## Quick Start

`mypy-upgrade` can be installed via `pip`.

    python3 -m pip install mypy-upgrade

If you want to run the latest version of the code, you can install from the
repo directly:

    python3 -m pip install -U git+https://github.com/ugognw/mypy-upgrade.git
    # or if you don't have 'git' installed
    python3 -m pip install -U https://github.com/ugognw/mypy-upgrade/tree/development

## Known Bugs

This utility is unable to silence mypy errors which occur on lines ending in
line continuation characters since any non-whitespace following such a
character is a syntax error. Pre-formatting your code with a PEP8 adherent
formatter (e.g., [`black`](http://black.readthedocs.io)) to replace such lines with parentheses
is recommended.

## Similar Projects

If this doesn't fit your use-case, maybe one of these other projects will!

* [`geo7/mypy_clean_slate`](https://github.com/geo7/mypy_clean_slate/tree/main): `mypy` reports are generated internally in `--strict` mode; includes
support for suppressing multiple errors on a single line; an inspiration for
much of `mypy-upgrade`'s implementation

* [`whtsky/mypy-silent`](https://github.com/whtsky/mypy-silent/tree/master):
relies solely on [`typer`](https://typer.tiangolo.com) + the standard
library; includes support for removing unused `type: ignore` comments but no
support for suppressing multiple errors on a single line; another inspiration
for much of `mypy-upgrade`'s implementation

* [`patrick91/mypy-silent`](https://github.com/patrick91/mypy-silent/tree/feature/multiple-errors): a fork of `whtsky/mypy-silent` with support for
suppressing multiple errors on a single line (on the `feature/multiple-errors` branch)

* [`uptickmetachu/mypy-silent`](https://github.com/uptickmetachu/mypy-silent/tree/main): a fork of `whtsky/mypy-silent` with support for suppressing
multiple errors on a single line
