Flake8 plugin to find commented out or dead code

Last update: Dec 27, 2022

Overview

flake8-eradicate

flake8 plugin to find commented out (or so called "dead") code.

This is quite important for the project in a long run. Based on eradicate project.

Installation

pip install flake8-eradicate

It is also a valuable part of wemake-python-styleguide.

Usage

Run your flake8 checker as usual. Commented code should raise an error.

Example:

flake8 your_module.py

Options

--eradicate-aggressive to enable aggressive mode from eradicate, can lead to false positives
--eradicate-whitelist to overwrite the whitelist from eradicate (# separated list)
--eradicate-whitelist-extend to extend the whitelist from eradicate (# separated list)

Error codes

Error code	Description
E800	Found commented out code

Output example

Here's how output looks like (we are using wemake formatter):

License

MIT.

Comments

Release master branch on PyPi

The current version of this plugin on PyPi (1.2.1) is not able to run with flake8's current version (5.0.1). This has been fixed in #262 but has not been updated on PyPi. Please could this be done?

opened by CalumY 12
fix performance issue due to search in tokens
Fixes #176

I looked into this and the issue was in the following block

comment_in_line = any( token_type == tokenize.COMMENT for token_type, _, _, _, _ in self._tokens)

self._tokens is actually containing the tokens from beginning of the file until the physical line yielded by flake8, this means that self._tokens is getting bigger and bigger every time flake8 invokes this plugin on the next lines, thus searching in self._tokens gets more and more expensive for large files as it's inefficient to search in large list by design (the large file is > 12000 lines so that makes a lot of tokens).

I switch the code to process the whole file instead of work line by line, that way it has to search for the comment token only once.

On the long python file attached in #176, this makes the processing time go from 30 sec to just 2 sec :rocket:
opened by bagerard 11
Update to new eradicate api
Even so the API of eradicate does change the new implementation is not that different.

I updated the usage of eradicate's API

I added the new CLI flags: --eradicate-whitelist and --eradicate-whitelist-extend which correspond to the appropriate flags from eradicate.

I removed the _Options class because I could not find a reason to keep it. Instead it is now a dict.

I removed the in_place option which was present in the _Options class because this setting only effects Eradicate.fix_file() which is the 'parent' function to the here used Eradicate.filter_commented_out_code() and does not get called.

I fixed test_incorrect_fixture() which should have failed on current master but does not. I dunno why.

I added 2 new tests for the new CLI args.

I updated the docs with the new CLI args

EDIT: when eradicate 2.0.0 is released I will update the dependency and finish this PR. Then the CI should also succeed. I tested all thing the CI does locally with success.
opened by Cielquan 11
`noqa` comments are detect as code
This line raises an E800 warning.

# noqa: A100

These do not:

# noqa: 100 # noqa: something # noqa: "Something"

If anything, the second block might be code (like a line of a multi-line dictionary definition). The first block is a valid noqa-comment and should not raise that warning.
bug
opened by tbrlpld 11
Black formatting flags as code
If you're in the unfortunate situation of having to deal with Black formatting, then this plugin catches the on/off markers as if they were code. Maybe just needs a specific whitelist for these 2 lines:

# fmt: off # fmt: on
bug dependencies
opened by Dreamsorcerer 7
[Regression] `flake8-eradicate==1.0.0` conflicts with `wemake-python-styleguide` under GHA
I don't know if this is the right repo for this issue but my best guess is that it is.

I'm using pre-commit.com too and I have an upstream flake8 hook set up. I've added flake8-eradicate>=1.0.0 and wemake-python-styleguide there. That seemed to work fine in local envs of developers under different OSs. But in GitHub Actions CI/CD something shady started happening, something quite unobvious and hard to debug. I suspected that some flake8 plugins misbehave but I had no idea which ones.

flake8 started failing with violations that were supposed to be ignored in the config. It wasn't really obvious in the CI because I used the wemake formatter and it somehow didn't show the error messages, only some lines from code. Example: https://github.com/ansible/pylibssh/runs/1566735649?check_suite_focus=true#step:11:31

I had to break into those GHA runner VMs over SSH using https://github.com/marketplace/actions/debugging-with-tmate to gather more intel! Commenting out #format = wemake revealed another unexpected detail — almost all of those error messages had error codes prefixed with a letter they weren't supposed to use — Z. Things like these came up:

tests/conftest.py:14:1: Z101 Found nested import "pylibsshext.session" from pylibsshext.session import Session ^ tests/conftest.py:44:9: Z111 Found bare raise outside of except "raise" raise ^ tests/conftest.py:122:9: Z110 Found wrong keyword "del" del ssh_session # noqa: WPS420 ^

I've commented out the flake8-eradicate>=1.0.0 line and it reported no violations when the version required by wemake-python-styleguide, which is flake8-eradicate (>=0.3,<0.4) (ref https://pypi.org/pypi/wemake-python-styleguide/json), was used.

I confirmed that when I tried to re-add flake8-eradicate>=1.0.0, it started throwing errors at me again. Then, I removed the wemake-python-styleguide line keeping flake8-eradicate>=1.0.0 in place and that worked too.

STR: fork https://github.com/ansible/pylibssh/tree/55b241a001c3621d68776f244a46650bfa5590f9, stick https://github.com/ansible/pylibssh/commit/b4f27eaac023ed8164f14128c85ce97b0e3fda1c there and connect over SSH to see the env.

N.B. I have no clue why but it's only happening under the GitHub Actions VMs and not locally (checked under CPython 3.8 and 3.9).
opened by webknjaz 6
Resolves Issue #103 noqa comments
Previously, noqa comments inside of a multi-line docstring where flagged as commented out code. When using eradicate directly on a file which includes such a noqa comment it does not show a violation.

Example of such a multi-line docstring:

def some_function(): """ Test for noqa comments in docstrings. This function has a multi-line doc string, but no return value is stipulated, while the function defines a return. This would raise DAR201 flake8 violation. To suppress this raise violation the following noqa comment is defined in the docstring. # noqa: DAR201 This noqa comment should not be detected as commented out code. `eradicate` itself does not raise this as a violation. """ return "something"

This kind of noqa comments are needed to suppress violations raised by darglint, e.g. violations associated with missing return statements in the docstring.

This issue is caused by passing isolated physical lines of code to the eradicate function filter_commented_out_code. That function does expect to operate on a file's whole source code rather than on isolated lines of code. From the whole source code the context of each line can be determined. This allows differentiation between actual comment lines and lines that only look like comments.

To resolve this issue, while still keeping the checker on one physical line at a time, a preliminary test is introduced that checks if the current physical line contains a comment according to the tokens of the physical line. These tokens are available as input to the plugin from flake8.

Solves #103
opened by tbrlpld 5
The "setuptools" requirement should be explicitly defined (ModuleNotFoundError: No module named 'pkg_resources').
Due to the usage of the "pkg_resources" module, the "setuptools" requirement should be explicitly defined (in this project, it is runtime requirement as well as installation time requirement). Because there are tools (such as Pants) that, after installing the library, do not maintain the installation time requirements, hence, this error is given:

ModuleNotFoundError: No module named 'pkg_resources'

which raises this exception on the Flake8:

flake8.exceptions.FailedToLoadPlugin: Flake8 failed to load plugin "E8" due to No module named 'pkg_resources'.
opened by AlirezaRoshanzamir 4
Bump flake8-isort from 2.8.0 to 2.9.0
Bumps flake8-isort from 2.8.0 to 2.9.0.

Changelog

Sourced from flake8-isort's changelog.

2.9.0 (2020-03-16)

Add python3.8 suport. [sobolevn]

Commits

3a61ab9 Preparing release 2.9.0

ea22956 chore: tell zest.releaser where to look for the version

fb456d7 Merge pull request #82 from sobolevn/issue-81

3528753 Adds python3.8, closes #81

ef75d34 Merge pull request #80 from jnns/show-version

8cd892b Fix version display in flake8 --help

8af7b8f Merge pull request #76 from pedrofreire/isort-version

eea5dff Increase required isort version to 4.3.5.

a3c084f Back to development: 2.8.1

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opened by dependabot-preview[bot] 4
Bump flake8-bugbear from 19.8.0 to 20.1.4
Bumps flake8-bugbear from 19.8.0 to 20.1.4.

Release notes

Sourced from flake8-bugbear's releases.

20.1.4

Ignore keywords for B009/B010

20.1.3

Silence B009/B010 for non-identifiers

State an ignore might be needed for optional B9x checks

20.1.2

Refer to README.rst for changes.

20.1.1

Refer to README.rst for changes.

20.1.0

Refer to README.md for changes.

Commits

80b280c Move to version 20.1.4 + Update CHANGES in README.rst

891fc92 Don't emit B009/B010 for keywords (#117)

e233647 Move to Version 20.1.3 + Update CHANGES in README.rst

7a07a5b Silence B009/B010 for non-identifiers (#116)

76ee744 State an ignore might be needed for optional B9x checks (#115)

9e5c19d Move to Version 20.1.2 + Update CHANGES in README.rst

238001d Fix error on attributes-of-attributes in except (...): clauses (#109)

3731237 Move to Version 20.1.1 + Update CHANGES in README.rst

e35343c Add new checks for except (...): clauses (#105)

04dd13b B012 Fix false positive with continue/break in loops in finally (#107)

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opened by dependabot-preview[bot] 4
Bump mypy from 0.760 to 0.770
Bumps mypy from 0.760 to 0.770.

Commits

92e3f39 Bump version to 0.770.

c4d8554 Support narrowing of walrus in most cases (#8458)

dc0d35f Revert "mypy: remove has_member (#8438)" (#8500)

30c46ab Properly track module_hidden and module_public for incomplete symbols (#8450)

ef0b0df Use fully qualified names for ambiguous class names resembling builtins. (#8425)

d128158 Sync typeshed (#8448)

09cdab4 mypy: remove has_member (#8438)

7af3191 Make ModuleFinder try identifying non-PEP 561 packages (#8238)

14ac8af [mypyc] Refactor methods into top-level functions in mypyc.genstatement (#8432)

ce24783 [mypyc] Refactor: extract builtin function specializers from genops (#8431)

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dependencies
opened by dependabot-preview[bot] 4
Bump attrs from 22.1.0 to 22.2.0
Bumps attrs from 22.1.0 to 22.2.0.

Release notes

Sourced from attrs's releases.

22.2.0

Highlights

It's been a lot busier than the changelog indicates, but a lot of the work happened under the hood (like some impressive performance improvements). But we've got still one big new feature that's are worthy the holidays:

Fields now have an alias argument that allows you to set the field's name in the generated __init__ method. This is especially useful for those who aren't fans of attrs's behavior of stripping underscores from private attribute names.

Special Thanks

This release would not be possible without my generous sponsors! Thank you to all of you making sustainable maintenance possible! If you would like to join them, go to https://github.com/sponsors/hynek and check out the sweet perks!

Above and Beyond

Variomedia AG (@variomedia), Tidelift (@tidelift), Sentry (@getsentry), HiredScore (@HiredScore), FilePreviews (@filepreviews), and Daniel Fortunov (@asqui).

Maintenance Sustainers

@rzijp, Adam Hill (@adamghill), Dan Groshev (@si14), Tamir Bahar (@tmr232), Adi Roiban (@adiroiban), Magnus Watn (@magnuswatn), David Cramer (@dcramer), Moving Content AG (@moving-content), Stein Magnus Jodal (@jodal), Iwan Aucamp (@aucampia), ProteinQure (@ProteinQure), Jesse Snyder (@jessesnyder), Rivo Laks (@rivol), Thomas Ballinger (@thomasballinger), @medecau, Ionel Cristian Mărieș (@ionelmc), The Westervelt Company (@westerveltco), Philippe Galvan (@PhilippeGalvan), Birk Jernström (@birkjernstrom), Jannis Leidel (@jezdez), Tim Schilling (@tim-schilling), Chris Withers (@cjw296), and Christopher Dignam (@chdsbd).

Not to forget 2 more amazing humans who chose to be generous but anonymous!

Full Changelog

Backwards-incompatible Changes

Python 3.5 is not supported anymore. #988

Deprecations

Python 3.6 is now deprecated and support will be removed in the next release. #1017

Changes

attrs.field() now supports an alias option for explicit __init__ argument names.

Get __init__ signatures matching any taste, peculiar or plain! The PEP 681 compatible alias option can be use to override private attribute name mangling, or add other arbitrary field argument name overrides. #950

attrs.NOTHING is now an enum value, making it possible to use with e.g. typing.Literal. #983

Added missing re-import of attr.AttrsInstance to the attrs namespace. #987

Fix slight performance regression in classes with custom __setattr__ and speedup even more. #991

Class-creation performance improvements by switching performance-sensitive templating operations to f-strings.

You can expect an improvement of about 5% -- even for very simple classes. #995

... (truncated)

Changelog

Sourced from attrs's changelog.

22.2.0 - 2022-12-21

Backwards-incompatible Changes

Python 3.5 is not supported anymore. #988

Deprecations

Python 3.6 is now deprecated and support will be removed in the next release. #1017

Changes

attrs.field() now supports an alias option for explicit __init__ argument names.

Get __init__ signatures matching any taste, peculiar or plain! The PEP 681 compatible alias option can be use to override private attribute name mangling, or add other arbitrary field argument name overrides. #950

attrs.NOTHING is now an enum value, making it possible to use with e.g. typing.Literal. #983

Added missing re-import of attr.AttrsInstance to the attrs namespace. #987

Fix slight performance regression in classes with custom __setattr__ and speedup even more. #991

Class-creation performance improvements by switching performance-sensitive templating operations to f-strings.

You can expect an improvement of about 5% -- even for very simple classes. #995

attrs.has() is now a TypeGuard for AttrsInstance. That means that type checkers know a class is an instance of an attrs class if you check it using attrs.has() (or attr.has()) first. #997

Made attrs.AttrsInstance stub available at runtime and fixed type errors related to the usage of attrs.AttrsInstance in Pyright. #999

On Python 3.10 and later, call abc.update_abstractmethods() on dict classes after creation. This improves the detection of abstractness. #1001

attrs's pickling methods now use dicts instead of tuples. That is safer and more robust across different versions of a class. #1009

Added attrs.validators.not_(wrapped_validator) to logically invert wrapped_validator by accepting only values where wrapped_validator rejects the value with a ValueError or TypeError (by default, exception types configurable). #1010

The type stubs for attrs.cmp_using() now have default values. #1027

To conform with PEP 681, attr.s() and attrs.define() now accept unsafe_hash in addition to hash. #1065

Commits

a9960de Prepare 22.2.0

566248a Don't linkcheck tree links

0f62805 Make towncrier marker independent from warning

b9f35eb Fix minor stub issues (#1072)

4ad4ea0 Use MyST-native include

519423d Use MyST-native doctest blocks in all MD

403adab Remove stray file

6957e4a Use new typographic branding in the last rst file, too

1bb2864 Convert examples.rst to md

c1c24cc Convert glossary.rst to md

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dependencies python
opened by dependabot[bot] 0
Support flake8 6.0
This PR updates dependencies to support flake8 >= 6.0:

Drops support for Python 3.7, adds support for Python 3.11

Drops support for flake8-quotes since it isn't yet compatible

Upgrades the other dependencies to their latest versions

Bumps the version of flake8-eradicate to 1.5.0
opened by danyeaw 2

False-Positive E800 in multiline docstring based on content

$ flake8 --version
5.0.4 (flake8-eradicate: 1.4.0, mccabe: 0.7.0, pycodestyle: 2.9.1, pyflakes: 2.5.0) CPython 3.9.15 on Linux

Working Code:

"""
#
# Copyright (c) 2022. All rights reserved.
#
# Project:    Test project
# Created:    2022-09-23
#
# @package
# @subpackage
# @author
#
"""

Output:

$ flake8
$ echo $?
0

Failing Code (Only date changed):

"""
#
# Copyright (c) 2022. All rights reserved.
#
# Project:    Test project
# Created:    2022-11-23
#
# @package
# @subpackage
# @author
#
"""

Output:

$ flake8
./main.py:6:1: E800 Found commented out code
$ echo $?
1

same thing happens if project is changed to a single word (e.g. test-project). Seems to be somehow related to the colons after Project/Created, if I remove them the errors disappear.

opened by manuelmaurer 0

Compat with flake8 >= 6
Notably, flake8 bumped min python version to 3.8.1

https://flake8.pycqa.org/en/latest/release-notes/6.0.0.html

I can draft a PR based on what you want to do, either:

minimal changes increasing flake8's upper bound

big changes with a 2.0, aligning with flake8 in supporting >= 3.8.1, 3.11 support
opened by g-as 7

Content of f-string interpreted as commented code

Using flake8-eradicate==1.2.1 On CPython 3.9.13 With flake8==4.0.1 Using the following code as an example

class FooClass(SpamClass):
    def render_html(self) -> str:
        return f"""
        <div>
            <div>
                <h2>
                    spam content <bold>{self.foo.bar().car()}</bold> to <bold>foo</bold><br/>
                </h2>
                <i>
                    “Some quote.”
                    <br/>~Quote author
                <i/>
            <div>
            </div>
                <table>
                    <tbody>
                        <tr>
                            <td><bold>Foo foo</bold></td>
                            <td>{self.bar.foo}</td>
                        </tr>
                        <tr>
                            <td><bold>Bar foo</bold></td>
                            <td>{self.barbar.foo}</td>
                        </tr>
                        <tr>
                            <td><bold>Foo spam</bold></td>
                            <td>
                                <a href="https://service.com/spam/foo/bar/{self.foo.car}">
                                    #{self.foo.car}
                                <a/>
                            </td>
                        </tr>
                        <tr>
                            <td><bold>Spam bar</bold></td>
                            <td>{self.foo()}</td>
                        </tr>
                    </tbody>
                </table>
            </div>
        </div>
        """

Following snipped, line #{self.foo.car} generates an error Found commented out code flake8(E800)

<a href="https://service.com/spam/foo/bar/{self.foo.car}">
    #{self.foo.car}
<a/>

Which, of course, is not correct because we are not dealing with a comment here. Removing the # from the content makes the error disappear, however, this is not the solution.

opened by krzysztof3-wisniewski 0

Issue with flake8-noqa, flake8-eradicate and commented out code
Hello. I'm using flake8, flake8-noqa & flake8-eradicate. Until flake8-noqa==1.2.5 it worked fine, but now I encounter weird behaviour.

Python version

$ python --version Python 3.9.10

Dependencies: flake8==5.0.4 flake8-eradicate==1.4.0 flake8-noqa==1.2.9

Current behaviour

code.py

# a = 5 a = 7

flake8 run

$ flake8 code.py code.py:1:1: E800 Found commented out code

code.py

# a = 5 # noqa: E800 a = 7

flake8 run

$ flake8 code.py code.py:1:1: NQA102 "# noqa: E800" has no matching violations

Expected behaviour

code.py

# a = 5 a = 7

flake8 run

$ flake8 code.py code.py:1:1: E800 Found commented out code

code.py

# a = 5 # noqa: E800 a = 7

flake8 run -- no error

$ flake8 code.py

I created the same issue in flake8-noqa repository but its author pointed out that the issue could be in your package. Can you please take a look?
opened by shestakovks 0

Releases(1.4.0)

1.4.0(Sep 20, 2022)
Features

Drops python3.6 support

Switches from pkg_resources to importlib_metadata

Misc

Uses [email protected]

Source code(tar.gz)
Source code(zip)
1.3.0(Aug 11, 2022)
Features

Adds [email protected] support

Source code(tar.gz)
Source code(zip)
1.2.1(Apr 26, 2022)
Bugfixes

Adds setuptools in the dependencies

Source code(tar.gz)
Source code(zip)
1.2.0(Oct 19, 2021)
Adds [email protected] support

Adds python3.10 support

Source code(tar.gz)
Source code(zip)
1.1.0(Jun 22, 2021)
Features

Improves performance on long files #210

Source code(tar.gz)
Source code(zip)
1.0.0(Oct 12, 2020)
Features

Adds python3.9 support

Now using new eradicate API

Adds --eradicate-whitelist and --eradicate-whitelist-append options

Misc

Moves to Github Actions

Source code(tar.gz)
Source code(zip)
0.4.0(Jun 4, 2020)
Features

Adds python3.5 support

Source code(tar.gz)
Source code(zip)
0.3.0(Mar 12, 2020)
Features

Adds python3.8 support

Source code(tar.gz)
Source code(zip)
0.2.4(Dec 18, 2019)
Bugfixes

Fixes that some lines inside the docstrings were marked as commented out code

Source code(tar.gz)
Source code(zip)
0.2.3(Oct 16, 2019)
Bugfixes

Fixed argparse bug, see #76

Source code(tar.gz)
Source code(zip)
0.2.2(Sep 27, 2019)
Bugfixes

Now eradicate-aggressive is parsed from config

Source code(tar.gz)
Source code(zip)
0.2.1(Jul 18, 2019)
Features

Updates to flake8 >= 3.7

Updates attrs < 20

Fixes plugin to work with stdin

Misc

Changes how we use flake8, moves from pytest-flake8 to native CLI

Source code(tar.gz)
Source code(zip)
0.2.0(Dec 24, 2018)
Features

Adds aggressive configuration option

Upgrades eradicate to 1.0

Source code(tar.gz)
Source code(zip)
0.1.1(Sep 26, 2018)
Bugfixes

Relies on attrs explicitly, see #2

Misc

Improves readme

Improves tests

Source code(tar.gz)
Source code(zip)
0.1.0(Sep 26, 2018)

Initial release
Source code(tar.gz)
Source code(zip)

Owner

wemake.services

GitHub Repository https://pypi.org/project/flake8-eradicate/

Flake8 plugin to find commented out or dead code

Related tags

Overview

flake8-eradicate

Installation

Usage

Options

Error codes

Output example

License

Comments

2.9.0 (2020-03-16)

20.1.4

20.1.3

20.1.2

20.1.1

20.1.0

22.2.0

Highlights

Special Thanks

Above and Beyond

Maintenance Sustainers

Full Changelog

Backwards-incompatible Changes

Deprecations

Changes

22.2.0 - 2022-12-21

Backwards-incompatible Changes

Deprecations

Changes

Releases(1.4.0)

1.4.0(Sep 20, 2022)

Features

Misc

1.3.0(Aug 11, 2022)

Features

1.2.1(Apr 26, 2022)

Bugfixes

1.2.0(Oct 19, 2021)

1.1.0(Jun 22, 2021)

Features

1.0.0(Oct 12, 2020)

Features

Misc

0.4.0(Jun 4, 2020)

Features

0.3.0(Mar 12, 2020)

Features

0.2.4(Dec 18, 2019)

Bugfixes

0.2.3(Oct 16, 2019)

Bugfixes

0.2.2(Sep 27, 2019)

Bugfixes

0.2.1(Jul 18, 2019)

Features

Misc

0.2.0(Dec 24, 2018)

Features

0.1.1(Sep 26, 2018)

Bugfixes

Misc

0.1.0(Sep 26, 2018)

Owner

wemake.services

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