Bryan-Roe

[Bryan-Roe]

Motivation and Context

Description

Contribution Checklist

• [ ] The code builds clean without any errors or warnings
• [ ] The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• [ ] All unit tests pass, and I have added new tests where possible
• [ ] I didn't break anyone :smile:

Summary by Sourcery

Introduce function choice behavior and enhance chat completion methods for GoogleAI and VertexAI connectors, including support for streaming completions and tool calls. Add new tests to verify the functionality and update prompt execution settings to handle tools and tool configurations.

New Features:

• Introduce function choice behavior for GoogleAIChatCompletion and VertexAIChatCompletion, allowing automatic invocation of functions during chat completions.
• Add support for streaming chat completions with function choice behavior in both GoogleAIChatCompletion and VertexAIChatCompletion.
• Implement new tests to verify the function choice behavior and streaming chat completions for both GoogleAI and VertexAI connectors.

Enhancements:

• Refactor chat completion methods to handle function choice behavior and tool calls in both GoogleAI and VertexAI connectors.
• Update GoogleAI and VertexAI prompt execution settings to include tools and tool configuration fields.
• Improve the formatting of user, assistant, and tool messages to support function calls and image content.

Tests:

• Add unit tests for function choice behavior in GoogleAIChatCompletion and VertexAIChatCompletion.
• Add integration tests for chat completions with function choice behavior and tool calls in both GoogleAI and VertexAI connectors.
• Update existing tests to cover new functionality and ensure backward compatibility.

[sourcery-ai[bot]]

Reviewer's Guide by Sourcery

This pull request adds support for function choice behavior and auto-invoking functions in GoogleAI and VertexAI chat completions. It includes new utility functions, test cases, and updates to existing methods to handle function calls. Additionally, it introduces fields for tools and tool_config in chat prompt execution settings and adds a region parameter to VertexAI services.

File-Level Changes

Files	Changes
python/semantic_kernel/connectors/ai/google/google_ai/services/google_ai_chat_completion.py python/semantic_kernel/connectors/ai/google/vertex_ai/services/vertex_ai_chat_completion.py	Added support for function choice behavior and auto-invoking functions in chat and streaming chat completions.
python/semantic_kernel/connectors/ai/google/vertex_ai/services/utils.py python/semantic_kernel/connectors/ai/google/google_ai/services/utils.py	Added utility functions for handling function choice behavior and formatting function calls.
python/tests/unit/connectors/google/google_ai/services/test_google_ai_chat_completion.py python/tests/unit/connectors/google/vertex_ai/services/test_vertex_ai_chat_completion.py	Added new test cases for function choice behavior and updated existing test cases to include additional parameters.
python/semantic_kernel/connectors/ai/google/vertex_ai/vertex_ai_prompt_execution_settings.py python/semantic_kernel/connectors/ai/google/google_ai/google_ai_prompt_execution_settings.py	Added fields for tools and tool_config in chat prompt execution settings.
python/semantic_kernel/connectors/ai/google/vertex_ai/services/vertex_ai_text_completion.py python/semantic_kernel/connectors/ai/google/vertex_ai/services/vertex_ai_text_embedding.py	Added region parameter and updated vertexai.init calls to include region.

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