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Attempt to clarify environment marker evaluation #1988

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Attempt to clarify environment marker evaluation #1988

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Attempt to clarify environment marker evaluation
ncoghlan Jan 10, 2026
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pre-commit-ci[bot] Jan 10, 2026
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2 changes: 1 addition & 1 deletion source/specifications/core-metadata.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -574,7 +574,7 @@ The format of a requirement string contains from one to four parts:
* An environment marker after a semicolon. This means that the
requirement is only needed in the specified conditions.

See :pep:`508` for full details of the allowed format.
See :ref:`dependency-specifiers` for full details of the allowed format.

The project names should correspond to names as found
on the `Python Package Index`_.
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4 changes: 2 additions & 2 deletions source/specifications/dependency-groups.rst
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Expand Up @@ -209,8 +209,8 @@ The output is therefore valid ``requirements.txt`` data.
realized_group = []
for item in raw_group:
if isinstance(item, str):
# packaging.requirements.Requirement parsing ensures that this is a valid
# PEP 508 Dependency Specifier
# packaging.requirements.Requirement parsing ensures that this
# is a valid dependency specifier
# raises InvalidRequirement on failure
Requirement(item)
realized_group.append(item)
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