---
name: python-appservice-deploy
description: "Deploy Python (Flask/Django/FastAPI) code to Azure App Service Linux. WHEN: \"Flask App Service\", \"Django App Service\", \"FastAPI App Service\", \"deploy Python to App Service\". DO NOT USE FOR: Container Apps, Functions, non-Python, Terraform/Bicep/IaC, full infra — use azure-prepare."
license: MIT
metadata:
  author: Microsoft
  version: "1.1.1"
title: python-appservice-deploy
canonical_url: https://skilld.dev/gh/microsoft/skills/python-appservice-deploy
last_updated: 2026-09-29T12:22:09.000Z
---

> **Skill from skilld.dev.** Follow the instructions below for this session. You do not need to install anything.
>
> Supporting files, fetch one when the Skill refers to it: [references/create-app.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/create-app.md), [references/deploy-azcli.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/deploy-azcli.md), [references/deploy-azd.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/deploy-azd.md), [references/detect.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/detect.md), [references/errors.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/errors.md), [references/post-deploy-message.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/post-deploy-message.md), [references/startup-commands.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/startup-commands.md), [references/transient-retry.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/transient-retry.md), [scripts/generate-app-name.ps1](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/scripts/generate-app-name.ps1), [scripts/generate-app-name.sh](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/scripts/generate-app-name.sh), [scripts/retry-az-create.ps1](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/scripts/retry-az-create.ps1), [scripts/retry-az-create.sh](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/scripts/retry-az-create.sh).
>
> If the user asked to install this Skill, run `npx skilld install microsoft/skills/python-appservice-deploy`. Install writes the Skill files into the project, so every session loads them.

# Python on Azure App Service — Code Deploy

Deploys Python (Flask, Django, FastAPI, generic) code to Azure App Service Linux (P0v3, Python 3.14). Creates RG + Plan + Web App if missing. Hand off to `azure-prepare` for VNet, Key Vault, databases, or IaC.

**MCP tools used**: `mcp_azure_mcp_subscription_list`, `mcp_azure_mcp_group_list`, `mcp_azure_mcp_appservice`, `mcp_azure_mcp_azd` (when `azure.yaml` is present).

## Workflow

1. **Resolve context — smart defaults, minimal prompts.** Only the app name is interactive; RG (`<app>-rg`), Plan (`<app>-plan`), region (current `az` default or `eastus2`), subscription are derived. [create-app.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/create-app.md) §1.
2. **Detect framework** (advisory, never blocks). [detect.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/detect.md).
3. **Choose path** — `azure.yaml` host: appservice → [deploy-azd.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/deploy-azd.md); else [deploy-azcli.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/deploy-azcli.md).
4. **Ensure RG → Plan (`P0v3 --is-linux`) → Web App (`--runtime "PYTHON:3.14"`)** exist. On transient ARM errors, follow [transient-retry.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/transient-retry.md). [create-app.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/create-app.md).
5. **Set startup** — Flask/Django: none (Oryx auto-detects). FastAPI: always `python -m uvicorn main:app --host 0.0.0.0`. Other: warn. [startup-commands.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/startup-commands.md).
6. **Set `SCM_DO_BUILD_DURING_DEPLOYMENT=true`**.
7. **Deploy** — `azd deploy` or `az webapp deploy --type zip --track-status false`.
8. **STOP. Print the post-deploy message** ([post-deploy-message.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/post-deploy-message.md)) and end the turn.

### Hard rules

- ⛔ **NO POST-DEPLOY VERIFICATION** — after deploy returns, do not run `az webapp log tail`, `curl`, `Invoke-WebRequest`, or any health probe. App Service needs 2–3 min to warm; a quiet log or early 5xx is not failure.
- ⛔ **SHELL SAFETY** — for `--runtime` always use `"PYTHON:3.14"` (colon). Never `"PYTHON|3.14"` (pipe is a shell operator).
- ⛔ **NEVER `az webapp up`** — deprecated. Use Step 7 commands.
- ✅ **URL FORMAT** — present endpoints as `https://...` URLs.

## Error Handling

See [errors.md](https://skilld.dev/api/skills-raw/microsoft/skills/python-appservice-deploy/references/errors.md) for the full symptom → cause → fix matrix. Quick triage: missing plan/app → re-run Step 4; container ping timeout on 8000 → fix startup (Step 5); `ModuleNotFoundError` after deploy → ensure Step 6 ran, redeploy.