Enhanced Error Handling in Streamlit for PromptFlow

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📅 2025-07-13 — Session: Enhanced Error Handling in Streamlit for PromptFlow

🕒 20:00–20:30
🏷️ Labels: Streamlit, Promptflow, Python, Error Handling, Subprocess
📂 Project: Dev
⭐ Priority: MEDIUM

Session Goal

The session aimed to enhance error handling and output visibility in a Streamlit script used for PromptFlow operations, specifically focusing on the 09_run_promptflow.py script.

Key Activities

  • Improved error visibility and output handling in the Streamlit UI by refining the run_step() function.
  • Addressed a ModuleNotFoundError related to ‘promptflow.tools’ in the Azure PromptFlow SDK.
  • Diagnosed and resolved a version mismatch issue with PromptFlow tools, suggesting upgrades for compatibility.
  • Provided solutions to handle non-existent promptflow-tools==1.18.1 package on PyPI.
  • Suggested fixes for environment inheritance issues in subprocesses when running commands in Streamlit versus the terminal.
  • Corrected the PYTHONPATH in subprocess environments to resolve import issues.

Achievements

  • Successfully enhanced the error handling capabilities of the Streamlit script.
  • Resolved import and version mismatch issues associated with PromptFlow tools, ensuring compatibility and correct execution.
  • Improved subprocess environment management, leading to more reliable script execution in different contexts.

Pending Tasks

  • Further testing is needed to ensure all edge cases are handled in the Streamlit environment.
  • Continuous monitoring for any new version-related issues in PromptFlow tools.
  • Documentation update to reflect changes in error handling and environment management strategies.

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