Anvil is a UK-based company sponsoring one month of work to revive PyPy's
"sandbox" mode and upgrade it to PyPy3. Thanks to them, sandboxing will be
given a second life!
The sandboxed PyPy is a special version of PyPy that runs
fully isolated. It gives a safe way to execute arbitrary Python
programs (whole programs, not small bits of code inside your larger Python
program). Such scripts can be fully untrusted, and they can try to do
anything—there are no syntax-based restrictions, for example—but whatever
they do, any...