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black is a popular python code formatter that helps you maintain consistent and readable code by automatically formatting your python code to conform to a set of style guidelines. it is opinionated, meaning it enforces a specific code style, which can save you time debating code formatting during code reviews. in this tutorial, you'll learn how to install and use black to format your python code with ease.
before you can use black, you need to install it. you can install black using pip, python's package manager. open your terminal and run:
this will download and install black and its dependencies.
once black is installed, you can format python code using the black command followed by the name of the python file or directory you want to format.
to format a single python file, run:
to format all python files in a directory and its subdirectories, use:
by default, black will modify the files in place. if you want to see the changes without actually applying them, you can use the --diff flag:
to format a file and apply the changes in place, simply run:
black will automatically format the file according to its style guidelines.
by default, black enforces a line length of 88 characters. if you want to use a different line length, you can specify it using the --line-length option. for example, to set the line length to 100 characters, use:
if you want to format all python files within a directory and its subdirectories, you can use the --recursive flag. for example:
to exclude specific files or directories from formatting, you can use the --exclude option. for example, to exclude all .test.py files:
black is highly opinionated about code formatting, which means it enforces its own set of style guidelines. however, you can create a configuration file to override some of black's defaults.
to generate a sample configuration file, run:
this command will create a pyproject.toml file in the specified directory. you can then edit this file to customize black's behavior. for exam ...