Dmytro Parfeniuk

Personal Archive

Tuesday, September 8, 2026 Kyiv · Established 2022 9 entries · 9 topics
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  1. FastAPI DDD Blog - Part 4

    2026 · python, software-architecture

    Publication Lifecycle. Editorial Review

  2. FastAPI DDD Blog - Part 3

    2026 · integrations, python, software-architecture

    External Integration. Users Engagement

  3. FastAPI DDD Blog - Part 2

    2026 · ai, python, software-architecture

    Cognitive Layer. LLM Integration

  4. FastAPI DDD Blog - Part 1

    2026 · python, software-architecture

    Setup Project. Dependencies Direction. CRUD

  5. Python concurrency and parallelism

    2023 · concurrency, python

    Threads, processes, and the GIL explained through the practical difference between waiting and working.

  6. Exceptions or conditional checks in Python

    2022 · python

    When EAFP keeps application code cleaner than returning `None` through multiple layers.

  7. Python hash() and identity

    2022 · patterns, python

    `hash()` is not a stable identity function, and large integer-style hashes can be truncated to platform hash width.

  8. Flatten nested iteration in Python

    2022 · patterns, python

    How to flatten nested iteration with `itertools.chain` and generator expressions without making the code harder to read.

  9. Python generators in practice

    2022 · python

    Concrete situations where generators actually earn their keep.

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© 2026 Dmytro Parfeniuk parfeniukink@gmail.com Kyiv · Est. 2022