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The slightly more compromising code formatter.

Project description



A slightly more compromising Python code formatter, based on the latest stable release of Black (20.8b10 at the time of writing).

Differences from Black

  • The default line length is 99 instead of 88 (configurable with --line-length).
  • Single quoted strings are preferred (configurable with --string-normalization none/single/double).
  • Empty lines between classes and defs are treated no differently from other code. The old behavior, which sometimes inserts double empty lines between them, remains available via --special-case-def-empty-lines.
  • The Vim plugin configuration variable for line length is named g:lavender_line_length instead of g:lavender_linelength, for consistency with the other configuration variable names.


Read up on Black, but replace black with lavender in your head.


Poetry is recommended for managing Python development tooling.

To initialize an isolated Python development environment for Lavender:

poetry install

Code Formatting

Code formatting for Python is handled by Lavender itself.

To check that the code is correctly formatted:

poetry run lavender --check .

To auto-format the code:

poetry run lavender .

Type Checking

Type checking for Python is handled by mypy.

To check that the code is correctly typed:

poetry run mypy .


Lavender is Copyright (c) 2019-2021 Michael Smith <>

Black, the software on which it was based, is Copyright (c) 2018-2020 Łukasz Langa

This program is free software: you can redistribute it and/or modify it under the terms of the MIT License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the MIT License for more details.

You should have received a copy of the MIT License along with this program. If not, see


Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this work by you shall be licensed as above, without any additional terms or conditions.

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Files for lavender, version 0.2.1
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Filename, size lavender-0.2.1-py3-none-any.whl (108.2 kB) File type Wheel Python version py3 Upload date Hashes View

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