(📚) Include a blurb in the section for 'Exact requirements' that says the difference without the ==

[KotlinIsland]

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

Issue

What is the difference between pendulum = "2.1.2" and pendulum = "==2.1.2".

In fact, the 'Dependency specification' page doesn't mention bare dependencies at all, which are the type that Poetry adds.
ie: 👉 poetry add pendulum==2.1.2 -> pendulum = "2.1.2".

[radoering]

There is no difference:

>>> from poetry.core.constraints.version import parse_constraint
>>> parse_constraint('2.1.2') == parse_constraint('==2.1.2')
True

Relevant part of the code: https://github.com/python-poetry/poetry-core/blob/b5d1934fed190bbfd1a303b44d5e2ef9a600efed/src/poetry/core/constraints/version/parser.py#L155-L165

[KotlinIsland]

Thought so. Is there any preference? the == part seems redundant at this point, I wonder why it exists, maybe it could be deprecated.

[Secrus]

Thought so. Is there any preference? the == part seems redundant at this point, I wonder why it exists, maybe it could be deprecated.

We are currently working towards supporting PEP 621 (pyproject metadata spec) and there will probably be a lot of changes and deprecations then. I don't think it makes sense to deprecate this right now.

[neersighted]

It's not even redundant -- we explicitly support PEP 440 style specifiers, but have our own features 'on top' (no ==, ^, etc).

PEP 621 will require Poetry to drop its own custom features in favor of the ecosystem-standard specifiers; if anything we may explore deprecating our syntax sugar.

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