black

Black is a popular command line tool used for code formatting in various programming languages, particularly Python. It aims to enforce a consistent and readable code style by automatically reformatting the code according to its predefined rules.

Some key features of Black are:

1. Opinionated Formatting: Black follows a set of strict formatting rules known as the PEP 8 style guide. It doesn't allow any configuration or customization to its formatting rules, ensuring consistent code style across different projects.

2. Idempotent Formatting: Black is designed to be idempotent, meaning that running it on already formatted code will not introduce any changes. This makes it safe to use as part of your codebase's automated formatting process.

3. Intelligent Line Length Handling: Black automatically wraps code to a maximum line length of 88 characters, following PEP 8's recommendation. It uses an intelligent algorithm to determine where line breaks should occur in complex expression statements.

4. Command Line Interface (CLI): Black provides a command line interface that allows you to format code files or entire projects with a single command. It supports various options like specifying which files or directories to format, excluding specific files, and even applying the changes directly to the source files.

5. Editor Integrations: Black integrates well with popular code editors and IDEs, such as Visual Studio Code, PyCharm, and Sublime Text. It can be set up to automatically format code on save or execute formatting commands directly from the editor's interface.

Overall, Black simplifies the process of maintaining consistent code style across Python projects, improves code readability, and reduces the time and effort spent on manual formatting decisions.