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Rework of the URL subtraction feature #1392

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@oleksbabieiev oleksbabieiev commented Oct 25, 2024

What do these changes do?

Rework of the URL subtraction feature (added in #1340; removed in #1391)

Are there changes in behavior for the user?

Being able to calculate the relative path between two URLs using the subtraction syntax:

from yarl import URL

target = URL("http://example.com/path/index.html")
base = URL("http://example.com/path/")

rel = target - base

print(rel)  # output: "index.html"

Related issue number

Resolves #1183

Checklist

  • I think the code is well written
  • Unit tests for the changes exist
  • Documentation reflects the changes

Known issues

@psf-chronographer psf-chronographer bot added the bot:chronographer:provided There is a change note present in this PR label Oct 25, 2024
tests/test_url_benchmarks.py Dismissed Show dismissed Hide dismissed
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codspeed-hq bot commented Oct 25, 2024

CodSpeed Performance Report

Merging #1392 will not alter performance

Comparing oleksbabieiev:subtraction (2341ece) with master (8ce8d67)

Summary

✅ 83 untouched benchmarks

🆕 2 new benchmarks

Benchmarks breakdown

Benchmark master oleksbabieiev:subtraction Change
🆕 test_url_subtract N/A 13.6 ms N/A
🆕 test_url_subtract_long_urls N/A 157.6 ms N/A

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codecov bot commented Oct 25, 2024

Codecov Report

Attention: Patch coverage is 99.01961% with 1 line in your changes missing coverage. Please review.

Project coverage is 96.10%. Comparing base (8ce8d67) to head (2341ece).

Files with missing lines Patch % Lines
tests/test_url.py 98.30% 1 Missing ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##           master    #1392      +/-   ##
==========================================
+ Coverage   96.05%   96.10%   +0.05%     
==========================================
  Files          31       31              
  Lines        5751     5852     +101     
  Branches      342      350       +8     
==========================================
+ Hits         5524     5624     +100     
- Misses        201      202       +1     
  Partials       26       26              
Flag Coverage Δ
CI-GHA 96.10% <99.01%> (+0.05%) ⬆️
MyPy 49.47% <82.35%> (+0.60%) ⬆️
OS-Linux 99.56% <100.00%> (+<0.01%) ⬆️
OS-Windows 99.62% <100.00%> (+<0.01%) ⬆️
OS-macOS 99.30% <100.00%> (+<0.01%) ⬆️
Py-3.10.11 99.28% <100.00%> (+<0.01%) ⬆️
Py-3.10.15 99.51% <100.00%> (+<0.01%) ⬆️
Py-3.11.10 99.51% <100.00%> (+<0.01%) ⬆️
Py-3.11.9 99.28% <100.00%> (+<0.01%) ⬆️
Py-3.12.7 99.51% <100.00%> (+<0.01%) ⬆️
Py-3.13.0 99.51% <100.00%> (+<0.01%) ⬆️
Py-3.9.13 99.24% <100.00%> (+<0.01%) ⬆️
Py-3.9.20 99.47% <100.00%> (+<0.01%) ⬆️
Py-pypy7.3.16 99.53% <100.00%> (+<0.01%) ⬆️
Py-pypy7.3.17 99.55% <100.00%> (+<0.01%) ⬆️
VM-macos-latest 99.30% <100.00%> (+<0.01%) ⬆️
VM-ubuntu-latest 99.56% <100.00%> (+<0.01%) ⬆️
VM-windows-latest 99.62% <100.00%> (+<0.01%) ⬆️
pytest 99.56% <100.00%> (+<0.01%) ⬆️

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@bdraco
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bdraco commented Oct 28, 2024

I'm going to do a 1.17.0 release so we can start preparing aiohttp 3.11.x and I want do to some more downstream cleanups. We can do a 1.18.0 for this once its ready

yarl/_url.py Outdated Show resolved Hide resolved
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bdraco commented Oct 30, 2024

Some conflicts happened. I think I've resolved them correctly


>>> target = URL('http://example.com/path/index.html')
>>> base = URL('http://example.com/')
>>> target - base
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Could you also document what happens when you do base - target?

assert result_url == expected_url


@pytest.mark.xfail(reason="Empty segments are not preserved")
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What does need to be done to fix this? It'd be useful to include this information into the reason so that it's obvious when it can be removed.

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this is bugs to address - c.f. #1388 (comment)

("path/to", "spam/", "../path/to"),
("path/../to", "path/", "../to"),
("path/..", ".", "path/.."),
("path/../replace/me", "path/../replace", "replace/me"),
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How is this different to the one below?
("path/../replace/me", "path/../replace/", "me"),

("http://example.com", "http://example.com/", "."),
("//example.com", "//example.com", "."),
("/path/to", "/spam/", "../path/to"),
("path/to", "spam/", "../path/to"),
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no path

("/", "/to", ".."),
("/", "/path/to", "../.."),

normal

("/path", "/path/to", ".."),

trailing / - empy segment at the end

("/path", "/path/", ".."),
("/path", "/path/to/", "../.."),

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Add Support for Relative Path Calculation
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