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This page is about the Python interpreter environment inside the Riza Code Interpreter API. If you’re looking to call the API from Python, head over to the API Client Libraries page.
The environment your Python runs in depends on the underlying Riza environment associated with your runtime. By default Python runs in our highly-performant WASI environment. If you’re executing Python in a custom runtime, then your Python runs in our microVM environment.

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Runtime

Riza runs Python 3.12.0 compiled to WASM (in the default WASI environment) or directly (in the microVM environment). The entire standard library is included. To add additional packages from PyPI, you’ll need to build a custom runtime. See Adding Packages for more information.

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Resource limits

There are no limitations beyond the general limits that apply to all Riza interpreter runtime environments. See our roadmap for planned future improvements.

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Standard I/O

You can write to stdout and stderr as you typically would. 
import sys

print('Hello, World!')
print('Something bad happened', file=sys.stderr)
You can read from stdin and access command line arguments and environment variables, all as you typically would. 
import os, sys

print(sys.stdin.read())
print(sys.argv)
print(dict(os.environ))

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Files

The filesystem is read-only in all environments.
You can pass input files via the API using the files parameter in the WASI and V8 environments. This feature is not yet available in the microVM environment. See the Files reference for more details.

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Accessing the network

Network access is blocked by default, so you need to allow traffic to individual hosts using the http request parameter. See the HTTP reference for a full example.

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In the WASI environment

You can make HTTP requests using the requests or httpx packages. Protocols other than HTTP are not supported, and code can’t access the network directly. 
import requests

resp = requests.post("https://httpbin.org/post", json={
    "foo": "bar",
})
print(resp.json())

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In the microVM environment

You can access the network any way you like, but you’ll need to set the (unfortunately named in this context) http request parameter to allow traffic to all hosts. Host-specific network controls are not yet supported. 
"http": {"allow": [{"host": "*"}]}