chore: modernize SDK to Python 3.8+ baseline

[thomasc-adyen]

This change aligns the library with modern Python standards by dropping support for legacy Python versions (2.7 and 3.6).

Technical Changes:

• Updated setup.py to set python_requires='>=3.8' and added classifiers up to Python 3.14.
• Introduced PEP 484 Type Hints in AdyenClient and AdyenResult to improve developer experience and IDE support.
• Removed legacy future imports and (object) inheritance.
• Modernized super() calls to use Python 3 syntax.
• Updated setup.py with install_requires and extras_require for idiomatic dependency management (requests, pycurl).
• Updated tox.ini and GitHub Actions to test across Python 3.8 through 3.14.

[gemini-code-assist]

Summary of Changes

Hello @thomasc-adyen, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request modernizes the Adyen Python SDK by aligning it with current Python standards. It drops support for Python 2.7 and 3.6, establishing Python 3.8 as the new minimum baseline. The changes introduce type hints for improved developer experience, remove outdated language constructs, and update dependency management and testing configurations to reflect the new Python version support.

Highlights

• Python Version Baseline: The SDK now officially supports Python 3.8 and newer, dropping compatibility with Python 2.7 and 3.6.
• Type Hinting Introduction: PEP 484 type hints have been added to AdyenClient and AdyenResult classes, improving code clarity and enabling better static analysis.
• Code Modernization: Legacy __future__ imports and explicit (object) inheritance have been removed, and super() calls updated to modern Python 3 syntax.
• Dependency Management: setup.py has been updated to use install_requires and extras_require for more idiomatic dependency handling, including requests and pycurl.
• Testing Environment Update: tox.ini and GitHub Actions configurations have been adjusted to reflect the new Python baseline, testing across Python 3.8 through 3.14.

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Changelog

• Adyen/init.py
  • Removed __future__ imports.
• Adyen/client.py
  • Added from __future__ import annotations for postponed evaluation of type annotations.
  • Imported typing.Any for flexible type hinting.
  • Removed explicit (object) inheritance from AdyenResult and AdyenClient classes.
  • Introduced type hints for AdyenResult's __init__ parameters and details attribute.
  • Added type hints for AdyenClient's __init__ parameters and psp_list attribute.
  • Added return type hint for AdyenResult.__str__.
• Adyen/exceptions.py
  • Modernized super() call from super(ClassName, self) to super().
• Adyen/httpclient.py
  • Removed __future__ imports.
  • Removed explicit (object) inheritance from HTTPClient class.
• Adyen/services/base.py
  • Removed explicit (object) inheritance from AdyenBase class.
  • Modernized super() call from super(ClassName, self) to super().
• Adyen/util.py
  • Removed __future__ imports.
• setup.py
  • Updated python_requires to >=3.8.
  • Added install_requires and extras_require for requests, pycurl, and test dependencies.
  • Updated classifiers to list Python versions from 3.8 to 3.14, removing 2.7 and 3.6.
• tox.ini
  • Updated envlist to test against Python 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, and 3.14, removing older versions.

Ignored Files

• Ignored by pattern: .github/workflows/** (1)
  • .github/workflows/python-ci.yml

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[gemini-code-assist]

Code Review

This pull request successfully modernizes the SDK to a Python 3.8+ baseline, aligning the library with current Python standards. Key improvements include the removal of legacy __future__ imports and (object) inheritance, modernization of super() calls, and the introduction of PEP 484 type hints in AdyenClient and AdyenResult. Dependency management in setup.py has been updated with python_requires and extras_require, and tox.ini and classifiers reflect the new supported Python versions (3.8-3.14). These changes enhance code clarity, maintainability, and developer experience.