Automatically add trailing commas to calls and literals
Project description
add-trailing-comma
A tool (and pre-commit hook) to automatically add trailing commas to calls and literals.
Installation
pip install add-trailing-comma
As a pre-commit hook
See pre-commit for instructions
Sample .pre-commit-config.yaml
:
- repo: https://github.com/asottile/add-trailing-comma
rev: v1.2.0
hooks:
- id: add-trailing-comma
multi-line method invocation style -- why?
# Sample of *ideal* syntax
function_call(
argument,
5 ** 5,
kwarg=foo,
)
- the initial paren is at the end of the line
- each argument is indented one level further than the function name
- the last parameter (unless the call contains an unpacking
(
*args
/**kwargs
)) has a trailing comma
This has the following benefits:
-
arbitrary indentation is avoided:
# I hear you like 15 space indents # oh your function name changed? guess you get to reindent :) very_long_call(arg, arg, arg)
-
adding / removing a parameter preserves
git blame
and is a minimal diff:# with no trailing commas x( - arg + arg, + arg2 )
# with trailing commas x( arg, + arg2, )
Implemented features
trailing commas for function calls
x(
arg,
- arg
+ arg,
)
trailing commas for function calls with unpackings
If --py35-plus
is passed, add-trailing-comma
will also perform the
following change:
x(
- *args
+ *args,
)
y(
- **kwargs
+ **kwargs,
)
Note that this would cause a SyntaxError
in earlier python versions.
trailing commas for tuple / list / dict / set literals
x = [
- 1, 2, 3
+ 1, 2, 3,
]
trailing commas for function definitions
def func(
arg1,
- arg2
+ arg2,
):
trailing commas for function definitions with unpacking arguments
If --py36-plus
is passed, add-trailing-comma
will also perform the
following change:
def f(
- *args
+ *args,
): pass
def g(
- **kwargs
+ **kwargs,
): pass
def h(
- *, kw=1
+ *, kw=1,
): pass
Note that this would cause a SyntaxError
in earlier python versions.
trailing commas for from
imports
from os import (
path,
- makedirs
+ makedirs,
)
trailing comma for class definitions
class C(
Base1,
- Base2
+ Base2,
):
pass
unhug trailing paren
x(
arg1,
- arg2)
+ arg2,
+)
unhug leading paren
-function_name(arg1,
- arg2)
+function_name(
+ arg1,
+ arg2,
+)
match closing brace indentation
x = [
1,
2,
3,
- ]
+]
remove unnecessary commas
yes yes, I realize the tool is called add-trailing-comma
:laughing:
-[1, 2, 3,]
-[1, 2, 3, ]
+[1, 2, 3]
+[1, 2, 3]
Project details
Release history Release notifications | RSS feed
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
Built Distribution
File details
Details for the file add_trailing_comma-1.2.0.tar.gz
.
File metadata
- Download URL: add_trailing_comma-1.2.0.tar.gz
- Upload date:
- Size: 8.6 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/1.13.0 pkginfo/1.5.0.1 requests/2.22.0 setuptools/41.0.1 requests-toolbelt/0.9.1 tqdm/4.32.1 CPython/3.6.7
File hashes
Algorithm | Hash digest | |
---|---|---|
SHA256 | 4dff2a1ebcf8f479b355708b642de28d287156596782b1ebc7293d18ddcc6ae7 |
|
MD5 | 7125f4ba23b05d2014649aa660aee9fe |
|
BLAKE2b-256 | b75156936172809aa719d7a4d96074d77ff796e51a0afaffacab03a63eca9355 |
Provenance
File details
Details for the file add_trailing_comma-1.2.0-py2.py3-none-any.whl
.
File metadata
- Download URL: add_trailing_comma-1.2.0-py2.py3-none-any.whl
- Upload date:
- Size: 8.2 kB
- Tags: Python 2, Python 3
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/1.13.0 pkginfo/1.5.0.1 requests/2.22.0 setuptools/41.0.1 requests-toolbelt/0.9.1 tqdm/4.32.1 CPython/3.6.7
File hashes
Algorithm | Hash digest | |
---|---|---|
SHA256 | fd71388240d2d971d83dd2adefe2338be8dc9787ea6aef972e2838cedd513fe3 |
|
MD5 | 901ff806686b8bf88586b7b015fa10cc |
|
BLAKE2b-256 | b216b7c6efc6a3e8899f6f86c965de8df4289eb950b7da7aee537aaecca81937 |