fix: improve merge token logic to account for nested dicts

[darrelhong]

Description

This PR fixes #3806 as it appears the the tokens object may contain nested objects. Added a function to handle merging nested dicts

All Promptflow Contribution checklist:

• The pull request does not introduce [breaking changes].
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.
• I confirm that all new dependencies are compatible with the MIT license.
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General Guidelines and Best Practices

• Title of the pull request is clear and informative.
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Testing Guidelines

• Pull request includes test coverage for the included changes.

[darrelhong]

@microsoft-github-policy-service agree

[chanedwin]

this might solve issues - #3834 and #3806
facing this issue as well

2024-11-03 21:55:24 +0800   30919 execution          ERROR    1/1 flow run failed, indexes: [0], exception of index 0: Execution failure in 'generate_creative_rewrites': (TypeError) unsupported operand type(s) for +: 'dict' and 'dict'

using promptflow==1.16.1 and openai ==1.44.1

[github-actions]

Hi, thank you for your interest in helping to improve the prompt flow experience and for your contribution. We've noticed that there hasn't been recent engagement on this pull request. If this is still an active work stream, please let us know by pushing some changes or leaving a comment.

[github-actions]

SDK CLI Global Config Test Result fix/merge-tokens

0 tests   0 ✅  0s ⏱️
0 suites  0 💤
0 files    0 ❌

Results for commit 8727276.

[github-actions]

Executor E2E Test Result fix/merge-tokens

0 tests   0 ✅  0s ⏱️
0 suites  0 💤
0 files    0 ❌

Results for commit 8727276.

[github-actions]

Executor Unit Test Result fix/merge-tokens

0 tests   0 ✅  0s ⏱️
0 suites  0 💤
0 files    0 ❌

Results for commit 8727276.

[github-actions]

Hi, thank you for your interest in helping to improve the prompt flow experience and for your contribution. We've noticed that there hasn't been recent engagement on this pull request. If this is still an active work stream, please let us know by pushing some changes or leaving a comment.

[mrgomdev]

Due to the lack of this patch, Promptflow fails to run recent LLMs that include prompt caching features, which replace integer tokens with dictionaries, among potentially many other issues. Although the project seems to be paused, I hope Promptflow can be maintained since it is one of the largest libraries with the most stars on orchestrating LLMs, even Langflow only support Mac in GUI.

[ali-el-moussawi-octo]

Hello and thank you for your great work.
Why did you close this PR ?
It solved the issue "ToolExecutionError: Execution failure in 'run_chatbot': (TypeError) unsupported operand type(s) for +: 'dict' and 'dict'"
Can you please repopen it and review it ?