Why Anaconda’s Bet on Pyodide Could Revolutionize Python in the Browser

Half a year ago, Anaconda launched PyScript, a framework that enables creating Python applications that run directly in the browser. PyScript is built on Pyodide, which compiles the CPython 3.8 interpreter to WebAssembly, allowing any PyPI package to be installed and exposing Python functions to JavaScript and the DOM.

Anaconda states that to ensure PyScript’s success they must strategically invest in the project and its core technology dependencies, such as WebAssembly and the open‑source Pyodide runtime.

In the past six months Anaconda has been actively improving PyScript’s technical infrastructure and recently announced joining the Bytecode Alliance as a voting member, hoping to help advance the standards for Wasm and WASI.

Bytecode Alliance, founded by Mozilla, Fastly, Intel, and Red Hat, promotes WebAssembly standardization and is actively developing the WebAssembly System Interface (WASI) to enable safe access to files, network, and memory resources beyond the browser.

According to Anaconda, Wasm is critical for PyScript, and WASI plays an essential role in Python runtimes and modules. They aim to collaborate with the alliance to push these standards forward, emphasizing that data‑science workloads need to run anywhere—locally, in the browser, or in the cloud.

Anaconda also heavily supports Pyodide, contributing code upstream and backing ongoing development, asserting that “Pyodide’s success is PyScript’s success.” They highlight Pyodide’s strengths in cross‑language bridging, packaging, and module support, and expect it to remain the default runtime for PyScript.

While betting on Pyodide, Anaconda is also experimenting with a new runtime based on MicroPython. A technical preview is available at https://pyscript.net/tech-preview/micropython/. MicroPython is well‑suited for constrained, OS‑less environments, and when compiled to Wasm the runtime size is only 303 KB, loading instantly and starting execution in under 100 ms.

Anaconda believes MicroPython adds significant value to PyScript, especially in scenarios where loading performance is critical, and notes that PyScript can be configured to support multiple runtimes, allowing developers to choose the most appropriate one for their use case.