Debug experiments

[coketaste]

📋 Description

Brief description of the changes in this pull request.

🔍 Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🧪 Test improvements
• 🔧 Code refactoring
• 🎨 Style/formatting changes

🎯 Related Issues

Fixes #(issue number)
Relates to #(issue number)

📍 Module/Area Affected

• Module 1 - Fundamentals
• Module 2 - Mathematics
• Module 3 - Programming
• Module 4 - Algorithms
• Module 5 - Error Correction
• Module 6 - Machine Learning
• Module 7 - Hardware
• Module 8 - Applications
• Documentation
• Testing/CI
• Project infrastructure

🧪 Testing

Describe how you tested your changes:

✅ Completed Testing

• All affected examples run without errors
• Help text is accurate and informative
• Visualizations display correctly
• Parameter validation works as expected
• Code follows project style guidelines

🖥️ Testing Environment

• OS: (e.g., Ubuntu 20.04)
• Python Version: (e.g., 3.9.7)
• Qiskit Version: (e.g., 1.0.0)

📝 Test Commands

# Commands used to test the changes
python module_x/example.py --help
python module_x/example.py --parameter value

📸 Screenshots (if applicable)

Include screenshots for visual changes, new visualizations, or UI improvements.

📚 Documentation Changes

• Updated relevant README files
• Added/updated docstrings
• Updated module documentation
• Added code comments for complex sections

⚡ Performance Impact

• No performance impact
• Improves performance
• May impact performance (please describe)

🔄 Breaking Changes

If this introduces breaking changes, please describe:

• What will break?
• How can users migrate?
• Is this change necessary?

📋 Checklist

Code Quality

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have added docstrings to new functions and classes

Testing

• I have tested these changes locally
• Existing examples still work correctly
• New functionality has been tested
• Error handling has been tested

Documentation

• I have made corresponding changes to the documentation
• I have updated relevant README files
• I have added appropriate comments to the code

Educational Value

• Changes maintain or improve educational value
• Learning objectives are clear
• Examples are appropriate for the target skill level
• Concepts are explained clearly

🎓 Educational Impact

How do these changes improve the learning experience?

• What new concepts do they teach?
• How do they fit into the overall curriculum?
• What skill level are they appropriate for?

🤝 Review Notes

Anything specific you'd like reviewers to focus on?

📈 Future Work

Any follow-up work that should be done in future PRs?

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Thank you for contributing to Quantum Computing 101! 🚀⚛️

[Copilot]

Pull Request Overview

This PR addresses compatibility issues with Qiskit 2.x and ensures all examples work properly in headless environments (Docker, SSH, remote servers). The changes focus on fixing deprecated API usage patterns and matplotlib configuration for non-interactive execution.

Key changes include:

• Fixed Qiskit 2.x compatibility issues across all 46 example files
• Added matplotlib non-interactive backend configuration for headless environments
• Updated documentation to reflect the improvements and compatibility fixes

Reviewed Changes

Copilot reviewed 51 out of 51 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
examples/utils/visualization.py	Added matplotlib 'Agg' backend configuration for headless support
examples/module8_applications/*.py	Fixed API compatibility and added headless matplotlib setup (6 files)
examples/module7_hardware/*.py	Resolved circuit composition issues and headless plotting (5 files)
examples/module6_machine_learning/*.py	Fixed measurement circuit creation and duplicate imports (5 files)
examples/module5_error_correction/*.py	Corrected DensityMatrix operations and import cleanup (5 files)
examples/module4_algorithms/*.py	Updated plotting calls and backend configuration (5 files)
examples/module3_programming/*.py	Fixed circuit patterns and matplotlib backend (6 files)
examples/module2_mathematics/*.py	Resolved plotting issues and added headless support (5 files)
examples/module1_fundamentals/*.py	Fixed measurement circuits and visualization cleanup (8 files)
README.md, CHANGELOG.md, etc.	Updated documentation to reflect Qiskit 2.x compatibility and headless features

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[Copilot]

The import statement from qiskit.circuit import QuantumCircuit is redundant since QuantumCircuit is already imported at the top. This local import should be removed to avoid confusion and maintain clean code structure.

[Copilot]

Another redundant import of QuantumCircuit that should be removed since it's already imported at the module level.

[Copilot]

Redundant imports of ClassicalRegister and QuantumCircuit since both are already imported at the top of the file. This local import should be removed.

Suggested change

from qiskit.circuit import ClassicalRegister, QuantumCircuit

[Copilot]

Redundant import of ClassicalRegister since it's already imported at the top of the file. This local import should be removed.

Suggested change

	from qiskit.circuit import ClassicalRegister
	qc_measure = QuantumCircuit(1, 1)
	qc_measure = QuantumCircuit(1, 1)