Python code

Python runs through Pyodide — CPython compiled to WebAssembly — in a separate thread. No Python is required on your machine.

The API

Symbol	Role
`input`	The value received on the input port
`vars`	A dictionary of the run variables
`print(...)`	Writes to the execution log
The last expression	Its value leaves on the `result` port

Example

commandes = input["commandes"]

payees = [c for c in commandes if c["statut"] == "payee"]
total = sum(c["montant"] for c in payees)

print(f"{len(payees)} commandes payées, total {total} €")

{"nombre": len(payees), "total": total}

Standard library

CPython’s standard library is available: json, re, datetime, hashlib, base64, itertools, collections…

import hashlib, hmac

signature = hmac.new(
    vars["secret"].encode(),
    input["corps"].encode(),
    hashlib.sha256,
).hexdigest()

{"signature": signature}

External packages

Declare them in the box’s packages field. They are downloaded from PyPI on the first run, cached, then loaded offline afterwards.

Stopping and the timeout

Exceeding the timeout or stopping the run interrupts execution with a KeyboardInterrupt, then terminates the thread if need be.