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#374: Climbing the Python Web Mountain

Published Mon, Mar 11, 2024, recorded Mon, Mar 11, 2024
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Brian #1: 6 ways to improve the architecture of your Python project (using import-linter)

  • Piglei
  • Using import-linter to
    • define architectural layers
    • check to make sure imports don’t violate (import from upper layers)
    • can also check for more contracts, such as
      • forbidden - disallow a specific from/to import
      • independence - list of modules that shouldn’t import from each other
  • Fixing violations
    • a process introduced to set exceptions for each violation in a config file
    • then fix violations 1 at a time (nice approach)
    • use the whole team if you can
  • Common methods for fixing dependency issues
    • Merging and splitting modules
    • Dependency Injection, including using protocols to keep type hints without the need to import just for types
    • Use simpler dependency types
    • Delaying function implementations
      • module global methods set by caller, or adding a simple plugin/callback system
    • Configuration driven
      • Setting import statements in a config file and using import_string() at runtime
    • Replace function calls with event-driven approaches

Michael #2: Mountaineer

  • Mountaineer is a batteries-included web framework for Python and React.
  • Mountaineer focuses on developer productivity above all else, with production speed a close second.
    • 📝 Typehints up and down the stack: frontend, backend, and database
    • 🎙️ Trivially easy client[HTML_REMOVED]server communication, data binding, and function calling
    • 🌎 Optimized server rendering for better accessibility and SEO
    • 🏹 Static analysis of web pages for strong validation: link validity, data access, etc.
    • 🤩 Skip the API or Node.js server just to serve frontend clients

Brian #3: Why Python's Integer Division Floors

  • Guido van Rossum
  • Integer division always floors (toward negative infinity) instead of truncating. (C truncates)
  • 5//2 → 2
  • -5//2 → -3
  • 5//-2 → -3
  • Reason,
    • For nice mathematical relationships with // and % (modulo).
    • a//b = quotient (q), a%b = remainder (r)
    • such that b*q + r = a, and 0 <= r < b
      • This works for both positive and negative a values
      • For negative b, the second rule has to change to 0 >= r > b
  • If you truncate (like C does), you have to use abs(r) for the first rule to work.
  • Theory of why C doesn’t do it this way: Probably a hardware limitation at the time when C was designed, due to “sign + magnitude” integers instead of modern two’s compliment integers.

Michael #4: Hatchet

  • Hatchet is a distributed, fault-tolerant task queue which replaces traditional message brokers and pub/sub systems.
  • It’s built to solve problems like concurrency, fairness, and durability
  • Concurrency, Fairness, and Rate limiting: Enable FIFO, LIFO, Round Robin, and Priority Queues with built-in strategies to avoid common pitfalls.
  • Architected for Resiliency: Customizable retry policies and built-in error handling to recover from transient failures.




Joke: Breaking Prod

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