integration-python
PostHog integration for any Python application using the Python SDK
What this skill does
# PostHog integration for Python
This skill helps you add PostHog analytics to Python applications.
## Workflow
Follow these steps in order to complete the integration:
1. `basic-integration-1.0-begin.md` - PostHog Setup - Begin ← **Start here**
2. `basic-integration-1.1-edit.md` - PostHog Setup - Edit
3. `basic-integration-1.2-revise.md` - PostHog Setup - Revise
4. `basic-integration-1.3-conclude.md` - PostHog Setup - Conclusion
## Reference files
- `references/EXAMPLE.md` - Python example project code
- `references/python.md` - Python - docs
- `references/posthog-python.md` - PostHog python SDK
- `references/identify-users.md` - Identify users - docs
- `references/basic-integration-1.0-begin.md` - PostHog setup - begin
- `references/basic-integration-1.1-edit.md` - PostHog setup - edit
- `references/basic-integration-1.2-revise.md` - PostHog setup - revise
- `references/basic-integration-1.3-conclude.md` - PostHog setup - conclusion
The example project shows the target implementation pattern. Consult the documentation for API details.
## Key principles
- **Environment variables**: Always use environment variables for PostHog keys. Never hardcode them.
- **Minimal changes**: Add PostHog code alongside existing integrations. Don't replace or restructure existing code.
- **Match the example**: Your implementation should follow the example project's patterns as closely as possible.
## Framework guidelines
- Remember that source code is available in the venv/site-packages directory
- posthog is the Python SDK package name
- Install dependencies with `pip install posthog` or `pip install -r requirements.txt` and do NOT use unquoted version specifiers like `>=` directly in shell commands
- In CLIs and scripts: MUST call posthog.shutdown() before exit or all events are lost
- Always use the Posthog() class constructor (instance-based API) instead of module-level posthog.api_key config
- Always include enable_exception_autocapture=True in the Posthog() constructor to automatically track exceptions
- NEVER send PII in capture() event properties — no emails, full names, phone numbers, physical addresses, IP addresses, or user-generated content
- PII belongs in identify() person properties, NOT in capture() event properties. Safe event properties are metadata like message_length, form_type, boolean flags.
- Register posthog_client.shutdown with atexit.register() to ensure all events are flushed on exit
- The Python SDK has NO identify() method — use posthog_client.set(distinct_id=user_id, properties={...}) to set person properties, or use identify_context(user_id) within a context
## Identifying users
Identify users during login and signup events. Refer to the example code and documentation for the correct identify pattern for this framework. If both frontend and backend code exist, pass the client-side session and distinct ID using `X-POSTHOG-DISTINCT-ID` and `X-POSTHOG-SESSION-ID` headers to maintain correlation.
## Error tracking
Add PostHog error tracking to relevant files, particularly around critical user flows and API boundaries.
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