Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Do not consider import a.b as b an explicit reexport #14086

Merged
merged 3 commits into from
Sep 20, 2023
Merged

Do not consider import a.b as b an explicit reexport #14086

merged 3 commits into from
Sep 20, 2023

Conversation

andersk
Copy link
Contributor

@andersk andersk commented Nov 13, 2022

The point of the import a as a and from a import b as b syntax for explicit reexport is that it indicates an intention to do something different from the ordinary import a and from a import b.

That is not the case with import a.b as b. Even mypy’s own code includes import mypy.types as types, which was not intended to be a reexport; if it were, it would be written from mypy import types as types.

Pyright agrees that import a.b as b should not reexport.

@andersk andersk mentioned this pull request Nov 13, 2022
Closed
@andersk
Do not consider ‘import a.b as b’ an explicit reexport
c444466 
The point of the ‘import a as a’ and ‘from a import b as b’ syntax for
explicit reexport is that it indicates an intention to do something
different from the ordinary ‘import a’ and ‘from a import b’.

That is not the case with ‘import a.b as b’.  Even mypy’s own code
includes ‘import mypy.types as types’, which was not intended to be a
reexport; if it were, it would be written ‘from mypy import types as
types’.

Pyright agrees that ‘import a.b as b’ should not reexport.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>
@github-actions

This comment has been minimized.

Sign in to view
hauntsaninja
hauntsaninja approved these changes Jan 10, 2023
View reviewed changes
Copy link
Collaborator

@hauntsaninja hauntsaninja left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Thanks, the change itself looks great. However, I'm hoping that we can fix #13965 before merging, to reduce the impact on downstream users

@github-actions

This comment has been minimized.

Sign in to view
@hauntsaninja
Copy link
Collaborator

#16129 should unblock this

@hauntsaninja hauntsaninja mentioned this pull request Sep 17, 2023
Merged
hauntsaninja added a commit that referenced this pull request Sep 19, 2023
@hauntsaninja
Preserve implicitly exported types via attribute access (#16129)
1dcff0d 
Resolves #13965. Follow up to #13967. Unblocks #14086
@github-actions
Copy link
Contributor

Diff from mypy_primer, showing the effect of this PR on open source code:

pytest (https://github.com/pytest-dev/pytest)
+ src/_pytest/hookspec.py:267: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/hookspec.py:267: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/hookspec.py:288: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/hookspec.py:288: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/hookspec.py:360: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/hookspec.py:360: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/hookspec.py:747: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/hookspec.py:747: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/hookspec.py:778: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/hookspec.py:778: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/compat.py:30: error: Module "py" does not explicitly export attribute "path"  [attr-defined]
+ src/_pytest/compat.py:34: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/compat.py:34: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/compat.py:36: error: Returning Any from function declared to return LEGACY_PATH?  [no-any-return]
+ src/_pytest/nodes.py:97: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/nodes.py:97: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/nodes.py:108: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/nodes.py:108: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/nodes.py:111: error: Statement is unreachable  [unreachable]
+ src/_pytest/nodes.py:119: error: Statement is unreachable  [unreachable]
+ src/_pytest/nodes.py:123: error: Statement is unreachable  [unreachable]
+ src/_pytest/nodes.py:172: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/nodes.py:172: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/nodes.py:193: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/nodes.py:193: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/nodes.py:587: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/nodes.py:587: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/nodes.py:644: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/nodes.py:644: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/config/compat.py:47: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/config/compat.py:47: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/config/compat.py:49: error: Statement is unreachable  [unreachable]
+ src/_pytest/config/compat.py:57: error: Statement is unreachable  [unreachable]
+ src/_pytest/config/compat.py:62: error: Statement is unreachable  [unreachable]
+ src/_pytest/python.py:667: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/python.py:667: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:58: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:58: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:63: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:63: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:94: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:94: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:106: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:106: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:110: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:110: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:118: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:118: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:122: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:122: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:126: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:126: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:134: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:134: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:138: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:138: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:142: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:142: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:290: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:290: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:294: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:294: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:309: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:309: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:331: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:331: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:339: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:339: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:344: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:344: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:354: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:354: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:365: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:365: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:375: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:375: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:385: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:385: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:408: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:408: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ src/_pytest/legacypath.py:413: error: Variable "_pytest.compat.LEGACY_PATH" is not valid as a type  [valid-type]
+ src/_pytest/legacypath.py:413: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
+ testing/test_legacypath.py:18: error: Unsupported left operand type for == (LEGACY_PATH?)  [operator]
+ testing/test_legacypath.py:24: error: LEGACY_PATH? has no attribute "check"  [attr-defined]
+ testing/test_legacypath.py:62: error: LEGACY_PATH? has no attribute "exists"  [attr-defined]
+ testing/_py/test_local.py:10: error: Module "py" does not explicitly export attribute "error"  [attr-defined]

@hauntsaninja
Copy link
Collaborator

I guess I was wrong that #16129 would fix, but glad this got me to make that PR. Looks like it would take a larger change to how we handle ModuleType, so I will call it good and merge this.

@hauntsaninja hauntsaninja merged commit 7089a7f into python:master Sep 20, 2023
17 checks passed
@andersk andersk deleted the import-dot-reexport branch September 20, 2023 05:48
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Reviewers

@hauntsaninja hauntsaninja hauntsaninja approved these changes

Assignees
No one assigned
Labels
upnext
Projects
None yet
Milestone
No milestone
Development

Successfully merging this pull request may close these issues.
2 participants
@andersk @hauntsaninja