Poetry: Support "standard" square bracket syntax for package extras

[ulope]

• [x] I have searched the issues of this repo and believe that this is not a duplicate.

Issue

It would be great if poetry would support the "standard" square bracket syntax to specify package extras (i.e. somepackage[someextra]).

I'm aware of the -E option but it's a departure from what other tools are doing and also it's not immediately clear how to specify multiple different extras for multiple packages.

[vab2048]

What is the recommended way of installing extras?

In other words what would be the equivalent of the command pip install dash[testing]?

[sdispater]

This is supported in the latest prereleases of the 1.0.0 release and will be globally available when it's officially released.

[a-ilango]

I'm unable to make use of this feature. The following is my pyproject.toml contents excerpt:

[tool.poetry.dependencies]
python = "^3.7"
...
testcontainers[postgresql] = "2.6.0"

This one throws the following error when issuing poetry install -v --dry-run

[UnexpectedCharError]
Unexpected character: u'p' at line 24 col 15

which is the character p in testcontainers[postgresql].
I would appreciate if someone can point to any workaround. Thanks!

poetry --version
Poetry version 1.0.5

[clintonroy]

If you try:

poetry add testcontainers[postgresql]

You'll get:

testcontainers = {extras = ["postgresql"], version = "^2.6.0"}

[a-ilango]

That helped. Appreciate the quick response @clintonroy !

[JulianFerry]

For anyone stumbling on this with the same issue as me:

• poetry add apache-beam[gcp] errors with zsh: no matches found: apache-beam[gcp]
• Writing poetry add "apache-beam[gcp]" fixed this