fix(pypi): fix a typo in parse_simpleapi_html (#2866)

It seems that the integration tests that I thought were covering this
had the same time. Added an assertion to the unit tests as well

Fixes #2863.

(cherry picked from commit 9dfa3ab)

Author: aignas

CHANGELOG.md

@@ -48,6 +48,17 @@ END_UNRELEASED_TEMPLATE
 -->
 
 
+{#1-4-1}
+## [1.4.1] - 2025-05-08
+
+[1.4.1]: https://github.com/bazel-contrib/rules_python/releases/tag/1.4.1
+
+{#1-4-1-fixed}
+### Fixed
+* (pypi) Fix a typo not allowing users to benefit from using the downloader when the hashes in the
+  requirements file are not present. Fixes
+  [#2863](https://github.com/bazel-contrib/rules_python/issues/2863).
+
 {#1-4-0}
 ## [1.4.0] - 2025-04-19
 

python/private/pypi/parse_simpleapi_html.bzl

@@ -52,7 +52,7 @@ def parse_simpleapi_html(*, url, content):
 
     # Each line follows the following pattern
     # <a href="https://...#sha256=..." attribute1="foo" ... attributeN="bar">filename</a><br />
-    sha256_by_version = {}
+    sha256s_by_version = {}
     for line in lines[1:]:
         dist_url, _, tail = line.partition("#sha256=")
         dist_url = _absolute_url(url, dist_url)
@@ -65,7 +65,7 @@ def parse_simpleapi_html(*, url, content):
         head, _, _ = tail.rpartition("</a>")
         maybe_metadata, _, filename = head.rpartition(">")
         version = _version(filename)
-        sha256_by_version.setdefault(version, []).append(sha256)
+        sha256s_by_version.setdefault(version, []).append(sha256)
 
         metadata_sha256 = ""
         metadata_url = ""
@@ -102,7 +102,7 @@ def parse_simpleapi_html(*, url, content):
     return struct(
         sdists = sdists,
         whls = whls,
-        sha256_by_version = sha256_by_version,
+        sha256s_by_version = sha256s_by_version,
     )
 
 _SDIST_EXTS = [

tests/pypi/parse_simpleapi_html/parse_simpleapi_html_tests.bzl

@@ -86,6 +86,7 @@ def _test_sdist(env):
         got = parse_simpleapi_html(url = input.url, content = html)
         env.expect.that_collection(got.sdists).has_size(1)
         env.expect.that_collection(got.whls).has_size(0)
+        env.expect.that_collection(got.sha256s_by_version).has_size(1)
         if not got:
             fail("expected at least one element, but did not get anything from:\n{}".format(html))