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Python: improve .env handling and observability samples (#4032)

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* Python: improve .env precedence and observability samples

- Switch load_settings to explicit precedence: overrides -> explicit .env -> environment -> defaults\n- Raise when env_file_path is provided but missing\n- Update settings docs and tests for new behavior\n- Refresh observability samples and README guidance for env loading options\n\nCloses #3864\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fixed some imports

* Fix load_settings CI regressions

Allow explicit env_file_path values that exist but are not regular files (for example /dev/null) by checking path existence before dotenv parsing, and restore a dict accumulator with typed return cast to satisfy mypy.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Avoid implicit dotenv in observability

Only load dotenv in observability helpers when env_file_path is explicitly provided, and remove test os.devnull workarounds that are no longer necessary.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This commit is contained in:
Eduard van Valkenburg
2026-02-18 12:18:52 +01:00
committed by GitHub
Unverified
parent f900febb6f
commit 534e5f5bf7
41 changed files with 250 additions and 221 deletions
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python/packages/copilotstudio/agent_framework_copilotstudio/_agent.py
+3 -3
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@@ -28,9 +28,9 @@ from ._acquire_token import acquire_token
class CopilotStudioSettings(TypedDict, total=False):
"""Copilot Studio model settings.
The settings are first loaded from environment variables with the prefix 'COPILOTSTUDIOAGENT__'.
If the environment variables are not found, the settings can be loaded from a .env file
with the encoding 'utf-8'.
Settings are resolved in this order: explicit keyword arguments, values from an
explicitly provided .env file, then environment variables with the prefix
'COPILOTSTUDIOAGENT__'.
Keys:
environmentid: Environment ID of environment with the Copilot Studio App.