Drop Python 3.9 support

[DanielYang59]

Summary

• Drop Python 3.9 support
• Bump codecov action to v4
• Turn off fail-fast in CI test strategy
• Make global variable all capital in unit test

---

For a follow up PR: remove numpy < 2 pin

• Currently torch (latest 2.4.0) doesn't work well with numpy for some reason on windows (looks like some module doesn't support NP2 yet, need to figure out which):

============================================================================= warnings summary ==============================================================================
venv\Lib\site-packages\torch\_subclasses\functional_tensor.py:258
  D:\monty\venv\Lib\site-packages\torch\_subclasses\functional_tensor.py:258: UserWarning: Failed to initialize NumPy: _ARRAY_API not found (Triggered internally at C:\actions-runner\_work\pytorch\pytorch\builder\windows\pytorch\torch\csrc\utils\tensor_numpy.cpp:84.)
    cpu = _conversion_method_template(device=torch.device("cpu"))

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
========================================================================== short test summary info ========================================================================== 
FAILED tests/test_json.py::TestJson::test_torch - RuntimeError: Numpy is not available

To recreate:

import json

import torch

from monty.json import MontyEncoder


tensor = torch.tensor([0, 1, 2])
jsonstr = json.dumps(tensor, cls=MontyEncoder)

[coderabbitai]

Walkthrough

The changes include updates to Python version requirements across multiple configuration files, enhancements to the GitHub Actions workflow, and formatting improvements in various test files. The workflow's fail-fast strategy was altered, and dependencies like numpy and pydantic were adjusted. Additionally, variable names in test files were refactored for consistency. Overall, these modifications refine compatibility with Python 3.10 and improve code organization.

Changes

Files	Change Summary
.github/workflows/test.yml	Updated python-version matrix to include 3.10, changed fail-fast to false, and upgraded Codecov action from v3 to v4.
README.md	Revised supported Python version from 3.x to 3.10 and above.
pylintrc	Changed Python version from 3.9 to 3.10.
pyproject.toml	Updated minimum Python version from >=3.9 to >=3.10, changed Black target version to py310, modified numpy constraint, added pydantic as a new dependency.
tasks.py, tests/test_*.py	Added blank lines for improved readability; no changes to functionality.
tests/test_shutil.py	Refactored variable name from test_dir to TEST_DIR for clarity.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant GitHub Actions
    participant Codecov
    participant Python Environment

    User->>GitHub Actions: Trigger CI Workflow
    GitHub Actions->>Python Environment: Run Tests with Python 3.10
    Python Environment-->>GitHub Actions: Test Results
    GitHub Actions->>Codecov: Report Coverage
    Codecov-->>GitHub Actions: Coverage Report
    GitHub Actions-->>User: CI Results

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🐇 In the meadow, we hop with glee,
Python's new version brings harmony!
With tests all polished, clear as a bell,
Our code is ready, all's well, all's well!
Dependencies updated, workflows refined,
Leap into coding, leave worries behind! 🌼

---

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.21%. Comparing base (1270c7b) to head (54697de).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #709      +/-   ##
==========================================
+ Coverage   81.02%   82.21%   +1.19%     
==========================================
  Files          27       27              
  Lines        1586     1586              
  Branches      361      361              
==========================================
+ Hits         1285     1304      +19     
+ Misses        236      217      -19     
  Partials       65       65              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[coderabbitai]

Actionable comments posted: 0

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 1270c7b and 54697de.

Files selected for processing (15)

• .github/workflows/test.yml (2 hunks)
• README.md (1 hunks)
• pylintrc (1 hunks)
• pyproject.toml (5 hunks)
• tasks.py (1 hunks)
• tests/test_collections.py (1 hunks)
• tests/test_design_patterns.py (1 hunks)
• tests/test_dev.py (1 hunks)
• tests/test_fractions.py (1 hunks)
• tests/test_functools.py (1 hunks)
• tests/test_io.py (1 hunks)
• tests/test_json.py (1 hunks)
• tests/test_os.py (1 hunks)
• tests/test_shutil.py (9 hunks)
• tests/test_tempfile.py (1 hunks)

Files skipped from review due to trivial changes (13)

• README.md
• pylintrc
• tasks.py
• tests/test_collections.py
• tests/test_design_patterns.py
• tests/test_dev.py
• tests/test_fractions.py
• tests/test_functools.py
• tests/test_io.py
• tests/test_json.py
• tests/test_os.py
• tests/test_shutil.py
• tests/test_tempfile.py

Additional comments not posted (7)

.github/workflows/test.yml (3)

8-8: Approved: fail-fast strategy set to false.

This change allows all jobs to run to completion, providing a complete picture of all test failures.

---

12-12: Approved: Updated Python version matrix.

The inclusion of Python 3.10 and removal of 3.9 aligns with the objective to drop Python 3.9 support.

---

33-33: Approved: Codecov action updated to v4.

Ensure to verify any changes in behavior or new features introduced by the new version.

pyproject.toml (4)

12-12: Approved: Updated minimum Python version to 3.10.

This change aligns with the objective to drop support for Python 3.9.

---

30-30: Approved: Simplified numpy version constraint.

The constraint numpy<2 ensures compatibility with versions below 2.0 while simplifying the versioning.

---

37-37: Approved: Added pydantic as a dependency.

This addition suggests enhanced data validation or settings management capabilities.

---

54-54: Approved: Updated black target version to py310.

This change aligns the formatting tools with the updated Python version requirement.