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[FSSDK-13300] Remove dead Python 3.7 typing guards - #526
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Farhan Anjum (FarhanAnjum-opti) merged 2 commits intoOct 26, 2026
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Farhan Anjum (FarhanAnjum-opti) merged 2 commits into
Farhan Anjum (FarhanAnjum-opti) merged 2 commits into
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mypy 2.4.0 rejects the `if version_info < (3, 8)` conditional Protocol imports, failing type-check on every PR. Those branches only run on Python 3.7, which has been unsupported since 5.0, so import Final, Literal, Protocol and TypedDict directly from typing. Drop the mypy.ini unused-ignore override that existed only for the old TypedDict import, and pin mypy~=2.4.0 so new mypy releases can't break CI unannounced. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Keep requirements/typing.txt as on master. The typing import cleanup alone fixes the mypy 2.4.0 failure. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Farhan Anjum (FarhanAnjum-opti)
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Muzahidul Islam (muzahidul-opti)
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Oct 26, 2026
Muzahidul Islam (muzahidul-opti)
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Oct 26, 2026
Muzahidul Islam (muzahidul-opti)
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Clean, mechanical cleanup. The < (3, 8) branches are dead for the supported 3.8+ range, and the remaining TypeGuard guard for 3.9 is correctly left alone. Moving the TYPE_CHECKING block in user_profile.py out of the old else branch keeps the same behavior. LGTM.
Farhan Anjum (FarhanAnjum-opti)
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Farhan Anjum (FarhanAnjum-opti)
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October 26, 2026 14:24
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Summary
if version_info < (3, 8): from typing_extensions import ... else: from typing import ...block (20 modules) with a directtypingimport ofFinal,Literal,ProtocolorTypedDict, and drop the now-unusedfrom sys import version_infoimports[mypy-optimizely.helpers.types]no_warn_unused_ignoresoverride inmypy.ini. It only existed for the# type: ignoreon the old conditionalTypedDictimport, which is gone.Why:
type-check (3.11)andtype-check (3.12)have failed on every PR and onmastersince mypy 2.4.0 was released (2026-10-01 20:39 UTC; the last green run was at 20:10 UTC). mypy 2.4.0 treatstyping.Protocolandtyping_extensions.Protocolas different types, so it flags the conditional import as an incompatible redefinition:The
< (3, 8)branches only run on Python 3.7, which hasn't been supported since 5.0 (README: "Version 5.0+: Python 3.8+"), so this removes dead code and changes no runtime behavior on any supported version.requirements/typing.txtis unchanged, so mypy stays unpinned as onmaster.Not in this PR: the
version_info < (3, 10)TypeGuardguard inevent/event_id_normalizer.pyis still needed while 3.9 is supported. Raising the minimum Python version is tracked separately in FSSDK-13301.Test plan
master: mypy 2.3.1 passes and mypy 2.4.0 fails with the 2 errors aboverequirements/typing.txt) on Python 3.11 and 3.12 passes both CI commands:mypy . --exclude "tests/testapp":Success: no issues found in 97 source filesmypy . --exclude "tests/" --strict:Success: no issues found in 57 source files. This also confirms the removedmypy.inioverride isn't needed.pytest --cov=optimizelyon Python 3.9, 3.11 and 3.12: 1036 passed on eachruff check .: all checks passedIssues
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