This PR closes #441 and #417 by removing the exclusion of ruff checks for dj_pipeline from pyproject.toml.

• UPDATE: I’ve added comments in this PR to highlight code changes and make the review process easier for reviewers.
• UPDATE2: the following changes have been reverted:
  • Revert black formatting ( revert max line length to 88 instead of 105)
  • Revert changes in streams.py
  • Revert changes about Assertion replacement in tests

This is a summary of the relevant changes that have been implemented, with all checks passing:

Resolved issues for aeon/dj_pipeline:

• B006: Fixed mutable default argument in plotting.py.
• B021: Removed dynamic references and made the docstring static in DeviceDataStream.key_source, ensuring it remains informative.
• D101, D102, D103, D105, D106: Added new docstrings.
• E501: Corrected most lines that were too long, adding exceptions in a few cases to preserve the intended meaning.
• D202, D205: Improved docstring formatting.
• F401, F403: Removed unused imported dependencies.
• I001: Sorted dependencies.
• B905: Added strict=False to the zip function to prevent the function from raising a ValueError if the iterables passed to it do not have the same length.
• Security: Replaced hashlib.md5 with hashlib.sha256 due to known vulnerabilities in the MD5 hashing algorithm -> Reverted: Change was reverted, and an ignore rule was added due to potential breakage introduced by the update.
• B904: Enhanced exception handling by using as err and raising exceptions with raise ... from err to differentiate errors.
• UP038: Used the new X | Y syntax for isinstance calls, as introduced in Python 3.10.
• PLR2004: Replaced magic values with constant variables.
• SIM108: Refactored visit_analysis to use the ternary operator.
• Removed checks from pyproject.toml list: No issues found for B006, B021, S110, UP038, E999, E722, F821, S324, S605, S607, E999, PLR2004.
• README.md: Added some text.
• Refactor: Updated the read method in the JsonList class within aeon/io/reader.py.
• E741: Renamed the variables in gen_hex_grad in aeon/analysis/block_plotting.py.
• Refactor: Made improvements to dictionary handling in aeon/analysis/block_plotting.py.
• # noqa Exceptions: Added # noqa comments for specific cases, e.g., in reader for F821 and # noqa PLW0127 for visit_analysis.py.

Additional fixes to the rest of the reporitory:

In addition to the above changes, I have also resolved most of the ruff lint issues from the ignored list in pyproject.toml, ensuring all checks passed:

• D100, D104, D105, D107: Added missing docstrings.
• E201, E202, E203, E231, E702: Corrected whitespace and formatting.
• S101: Replaced assertions with exceptions to ensure expected behavior in all scenarios; also added logger=dj.logger where appropriate. -> Reverted assertions replacement in tests and added rule in pyproject since it is acceptable to use for small, simple tests.
• PT013: Fixed the import of pytest in tests.
• pyproject.toml updated accordingly
• All checks passed after the latest changes in this PR.

Deprecation Fix:

• Updated all instances of datetime.utcnow() to datetime.now(timezone.utc) to address deprecation issues.