Introduction to Data Ingestion
Ingesting from APIs
Reading Multiple File Formats
Pydantic for Data Validation
Writing to Databases
Error Handling and Logging
Practice
Assignment
Gotchas & Pitfalls
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9. Gotchas & Pitfalls
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Suggested Topics
- API authentication: storing credentials securely, rotating keys
- Pagination off-by-one errors: missing the first/last record
- Rate limit handling: exponential backoff vs fixed delays
- Timezone issues: UTC vs local time, inconsistent formats
- Null/None handling: distinguishing between "missing" and "zero"
- Database connection errors: network timeouts, connection pool exhaustion
- Duplicate handling: idempotency keys and unique constraints
- Large data handling: memory limits, chunking vs streaming
- Error masking: logging enough detail without leaking sensitive data
- Testing challenges: mocking external APIs, testing retries
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