scrapy / scrapy/cssselect

Namespace syntax

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bug
Dominant language
Python
Stars
310
Forks
70
Avg merge
2h 9m
Merged PRs (30d)
4

Description

There are four different syntaxes for namespaces in element types and attribute names: ns|E, *|E, |E and just E. All four have a different meaning: http://www.w3.org/TR/css3-selectors/#typenmsp

cssselect currently parses *|E and E the same, and fails to parse |E.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating cssselect's namespace parsing entry point and compare its handling with the linked CSS Selectors specification. Verify that ns|E, *|E, |E, and E are parsed as four distinct forms, including successful parsing of |E.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
web-dev
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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