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Flake8 plugin that forbids implicit string literal concatenations

Project description

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Flake8 plugin that forbids implicit string literal concatenations.

# NG
a = "abc" "def"
b = ["aaa",
# OK
a = "abcdef"
b = ["aaa",
     "bbb" +


Install via pip:

pip install flake8-no-implicit-concat

Violation code

The plugin uses the prefix NIC, short for No Implicit Concatenation.

Code Description
NIC001 Implicitly concatenated string literals

Other Plugins & Linters

  • flake8-implicit-str-concat Flake8 plugin to encourage correct string literal concatenation. There are cases where this plugin prefers implicit concatenation over explicit + operator , so these two plugins cannot be used in combination.
  • wemake-python-styleguide Set of strict flake8 rules with some other plugins as dependencies. It implements WPS326 Found implicit string concatenation, which also checks implicit string concatenations, as one of the many rules it has.
  • pylint This linter has implicit-str-concat rule. By default it only looks for occurrences of implicit concatenations on the same line, but you can give the --check-str-concat-over-line-jumps=y option for concatenations over multiple lines.


Use Pipenv to run test locally:

pipenv install --dev
pipenv run check


This software is licensed under MIT license. See LICENSE for details.

The code was derived from flake8-implicit-str-concat, which is developed by Dylan Turner and also licensed under MIT license.

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Files for flake8-no-implicit-concat, version 0.1.4
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