[Python] Choose between extras of the same dependency with Poetry

I have a Python project managed with Poetry.

I want to install either psycopg[binary] or psycopg[c] via

$ poetry install -E pgbinary


or

$ poetry install -E pgc


These extras should be mutually exclusive, i.e.

$ poetry install -E pgbinary -E pgc


should raise an error.

This is what I wrote in the pyproject.toml:

[tool.poetry.dependencies]
python = "^3.9"
...
psycopg = { version = "^3.1.0", extras = ["binary", "c"], optional = true}


[tool.poetry.extras]
pgbinary = ["psycopg[binary]"]
pgc = ["psycopg[c]"]


But when I do one of the following

$ poetry install
$ poetry install -E pgbinay
$ poetry install -E pgc


I always get this

The Poetry configuration is invalid:
- data.extras.pgbinary[0] must match pattern ^[a-zA-Z-_.0-9]+$


The problem seems related to the square brackets in psycopg[binary] (or psycopg[c]).

Is there a way to choose which extra to install for a specific library during the poetry install?

UPDATE


I've solved with this for now

[tool.poetry.dependencies]
...
psycopg = {version = "^3.1.9", optional=true}
psycopg-binary = {version = "^3.1.9", optional=true}
psycopg-c = {version = "^3.1.9", optional=true}

[tool.poetry.extras]
pgbinary = ["psycopg", "psycopg-binary"]
pgc = ["psycopg", "psycopg-c"]


It works, but has stated here

You shouldn’t install this package directly: use instead

pip install "psycopg[c]"

to install a version of the optimization package matching the psycopg version installed.


If there is a way to write version = "^3.1.9" just once, it would be great.

Moreover, the extras are still not mutually exclusive.

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