feat(python): Add examples (deduplicate, delay) and tests (Issue #42)

[adityashirsatrao007]

This PR addresses Issue #42 by adding new Python examples and a comprehensive test suite.

New Examples:

• deduplicate.py: Demonstrates using .distinct() to remove consecutive duplicates.
• delay_line.py: Demonstrates using .delay() for temporal shifting.

New Tests:

• test_streams.py: unittest suite covering map, ilter, distinct, limit, and collect operators.

This enhances the documentation and provides a verification baseline for Python binding development.

[Copilot]

Pull request overview

This PR addresses Issue #42 by adding Python examples demonstrating stream operators and a comprehensive test suite for the Python bindings. It also introduces a new window stream operator in the Rust core.

Key Changes:

• New Python examples for distinct() and delay() operators with practical demonstrations
• Test suite covering map, filter, distinct, limit, and collect operators
• New WindowStream implementation for time-based buffering in Rust
• Python bindings for GraphState, collect(), and print() stream operators

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 15 comments.

Show a summary per file

File	Description
wingfoil/src/nodes/window.rs	Implements time-based windowing stream operator with automatic flushing
wingfoil/src/nodes/mod.rs	Integrates WindowStream module and adds window() method to StreamOperators trait
wingfoil-python/src/py_stream.rs	Adds Python bindings for print() and collect() stream operators
wingfoil-python/src/py_graph_state.rs	Exposes GraphState to Python with time tracking functionality
wingfoil-python/src/lib.rs	Registers PyGraphState class in the Python module
wingfoil-python/examples/delay_line.py	Demonstrates delay() operator for temporal shifting of streams
wingfoil-python/examples/deduplicate.py	Demonstrates distinct() operator for filtering consecutive duplicates
wingfoil-python/tests/test_streams.py	Unit tests validating map, filter, distinct, limit, and collect operators

Comments suppressed due to low confidence (3)

wingfoil-python/examples/deduplicate.py:9

• Import of 'wingfoil' is not used.

import wingfoil

wingfoil-python/examples/delay_line.py:9

• Import of 'wingfoil' is not used.

import wingfoil

wingfoil-python/tests/test_streams.py:2

• Import of 'wingfoil' is not used.

import wingfoil

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[0-jake-0]

This is great but can i have just the new python examples by themselves without any other changes please.

[adityashirsatrao007]

Yes I'll update it in few hours and let you know.

[0-jake-0]

Looks good. Thanks!