python / python/mypy

Different behaviour of 1.0.0 wheels from pypi

Open
#14,653 3 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

bug
Dominant language
Python
Stars
20.6k
Forks
3.3k
PR merge metrics
PR metrics pending

Description

Hello,

I noticed that the manylinux_2_17_x86_64.manylinux2014_x86_64 and py3-none-any pypi wheels behave differently.

Bug Report

...but I don't know specifically what the issue is 😬
I wrote a mypy plugin. It used to work correctly with mypy 0.920-0.991. Then the tests started failing in CI when 1.0.0 was released. I've easily reproduced that locally. Wanted to get to the bottom of it, so downloaded mypy source, checked out v1.0.0, installed the local package and... the tests passed.
I've only later discovered that when I use the py3-none-any wheel from pypi it also works as expected.

The plugin hooks into get_type_analyze_hook, get_method_signature_hook and get_function_signature_hook modifying instances of a specific class (joining Protocols together). I understand this is no place to seek help in my project, but I believe the issue is with these particular distributions and not on my end, since everything works correctly when using the source or the generic wheel.

Locally I'm testing everything with python 3.10.9, but I've also confirmed this is the case with 3.11.1 and it failed with 3.7.15 in CI (Github Actions).

To Reproduce

I wish I could provide a simpler example, but I'm afraid I can't. I've tried narrowing the issue down, but couldn't do it with a compiled version of mypy and the source version works beautifully 😬 .

git clone https://github.com/klausweiss/typing-protocol-intersection.git --branch mypy-1.0.0
cd typing-protocol-intersection
python -m venv venv-manylinux
source venv-manylinux/bin/activate
pip download mypy==1.0.0 --platform=manylinux_2_17_x86_64 --only-binary=:all: 
pip install *.whl
mypy --config-file tests/test-mypy.ini tests/testcases/in_generic_param_unhappy_path.py --no-incremental

Outcome is

tests/testcases/in_generic_param_unhappy_path.py:49:15: error: Argument 1 to "get_x_y_1" has incompatible type "ProtocolIntersection[HasX]"; expected "DesiredObject"  [arg-type]
tests/testcases/in_generic_param_unhappy_path.py:49:15: note: "ProtocolIntersection" is missing following "DesiredObject" protocol member:
tests/testcases/in_generic_param_unhappy_path.py:49:15: note:     y
Found 1 error in 1 file (checked 1 source file)

Expected Behavior

Outcome:

tests/testcases/in_generic_param_unhappy_path.py:49:15: error: Argument 1 to "get_x_y_1" has incompatible type "ProtocolIntersection[HasX]"; expected "DesiredObject"  [arg-type]
tests/testcases/in_generic_param_unhappy_path.py:49:15: note: "ProtocolIntersection" is missing following "DesiredObject" protocol member:
tests/testcases/in_generic_param_unhappy_path.py:49:15: note:     y
tests/testcases/in_generic_param_unhappy_path.py:50:15: error: Argument 1 to "get_x_y_2" has incompatible type "typing_protocol_intersection.types.ProtocolIntersection[HasX]"; expected "typing_protocol_intersection.types.ProtocolIntersection[HasY, HasX]"  [arg-type]
tests/testcases/in_generic_param_unhappy_path.py:50:15: note: "ProtocolIntersection" is missing following "ProtocolIntersection" protocol member:
tests/testcases/in_generic_param_unhappy_path.py:50:15: note:     y
Found 2 errors in 1 file (checked 1 source file)

You get the expected outcome when you follow the same steps as above, but downloading a py3-any-none wheel instead:

git clone https://github.com/klausweiss/typing-protocol-intersection.git --branch mypy-1.0.0
cd typing-protocol-intersection
python -m venv venv-manylinux
source venv-manylinux/bin/activate
pip download mypy==1.0.0 --platform=none --only-binary=:all: 
pip install *.whl
mypy --config-file tests/test-mypy.ini tests/testcases/in_generic_param_unhappy_path.py --no-incremental

Again, that's also the behavior I observed when cloning the mypy repo, checking out v1.0.0, and installing from a local directory.

Actual Behavior

See the To Reproduce section.

Your Environment

  • Mypy version used: v1.0.0
  • Mypy command-line flags: --no-incremental --config-file tests/test-mypy.ini
  • Mypy configuration options from mypy.ini (and other config files):
    • contents of tests/test-mypy.ini:
      [mypy]
      plugins = ../typing_protocol_intersection/mypy_plugin.py
      check_untyped_defs = True
      disallow_any_generics = True
      disallow_any_unimported = True
      disallow_incomplete_defs = True
      disallow_subclassing_any = True
      disallow_untyped_calls = True
      disallow_untyped_decorators = True
      disallow_untyped_defs = True
      implicit_reexport = False
      no_implicit_optional = True
      show_column_numbers = True
      show_error_codes = True
      strict_equality = True
      strict_optional = True
      warn_no_return = True
      warn_redundant_casts = True
      warn_return_any = True
      warn_unused_configs = True
      
  • Python version used: 3.10.9 but also with 3.11.1 and 3.7.15, haven't checked any others
  • OS: Manjaro Linux 5.15.91, glibc version 2.36

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the linked typing-protocol-intersection reproduction and its mypy-1.0.0 branch. Run the provided pip download and mypy commands for the manylinux and py3-none-any wheels, then compare those results with a source checkout. Done means the distribution-specific behavior is explained and the reported reproduction no longer differs unexpectedly.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
devtools
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.