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Replace httpx with httpx2, update imports and documentation, and alias httpx in tests so RESPX mocks intercept requests. Disable the RESPX pytest plugin to ensure aliasing happens before import. Update packaging, CI workflows, and documentation to require Python 3.10 or newer. BREAKING CHANGE: Python 3.9 is no longer supported. Signed-off-by: Fredrik Fornwall <fredrik@fornwall.net>
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Replaces the
httpx[http2] == 0.28.1dependency withhttpx2[http2] == 2.13.1, Pydantic's maintained fork ofhttpx.Its only API change is the package rename (
httpx→httpx2,httpcore→httpcore2), so the code change is mechanical: imports andhttpx.Xreferences in_http_client.py,_retry.py,_utils.py,messaging.pyand the tests. Internal helper names such ashandle_platform_error_from_httpxare unchanged.Breaking: Python 3.9 dropped
httpx2 requires Python >= 3.10 (it dropped 3.9 in 2.1.0), so:
setup.py:python_requires='>=3.10', version guard and classifiers updated3.10–3.13+pypy3.10(was3.9–3.13+pypy3.9); lint, release and nightly jobs now use 3.10Is this ok to do now, considering that python 3.9 went EOL at 2025-10?
Test setup: respx
respx only patches the
httpxmodule (and still pulls it in as a dependency), sotests/test_retry.pywould otherwise make unmocked requests.tests/conftest.pycallshttpx2.alias_httpx()soimport httpxresolves to httpx2 and respx patches the classes the SDK uses. The respx pytest plugin is disabled viaaddopts = -p no:respxinsetup.cfg, since it importshttpxat startup before conftest can alias it; no test uses itsrespx_mockfixture.Other behaviour changes from httpx2
User-Agentchanges frompython-httpx/…topython-httpx2/…; the logger is now namedhttpx2truststoreinstead ofcertifi