Developer Voices

PyO3: From Python to Rust and Back Again (with David Hewitt)

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Jul 3, 2024
David Hewitt, the principal committer to PyO3, shares insights into Python and Rust integration. Topics include bridging Rust and Python, exploring lifetimes in Rust, smart pointers, error handling, traits comparison, resource handling, and bringing Rust's power to the Python world.
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ANECDOTE

David Hewitt's Rust-Python Journey

  • David Hewitt's path to PyO3 began with Python and C++ interoperability challenges he faced professionally.
  • His personal hobby interest in Rust led him to contribute and eventually champion PyO3 development.
INSIGHT

Python Objects as C Structs

  • Python's objects are implemented as C structs with specific memory layouts.
  • This design enables interoperability at the C level, which Rust can leverage due to similar ABI compatibility.
INSIGHT

Rust Speaks Python's C ABI

  • Rust interoperates with Python by matching Python's C API and ABI through Rust crates.
  • This enables seamless calling between the two languages using shared memory layouts and calling conventions.
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