simonw

What I want from a run-Python-in-WASM solution

I want to be able to use WebAssembly as a sandbox to safely run Python code from untrusted sources, within my existing Python applications.

I'd like to be able to:

• Pass in an untrusted string of Python code and have that evaluated
• Maybe also pass in initial variables to be used in the code - though hard-coding them would work OK too
• Have the code run in a sandboxed environment, with a timeout and memory limit
• The sandbox disallows network access and disk access - it can only access the variables passed in

simonw

{
  "segments": [
    {
      "speaker": "A",
      "start": "0:00:00.497812",
      "stop": "0:02:48.977813",
      "transcript": [
        {
          "start": "0:00:00.497812",
          "text": " Yeah, this is a document which I first saw at three o'clock this morning, I think."

simonw

ChatGPT warning mockup

From https://twitter.com/simonw/status/1641467385688489984

simonw

ytid,start_s,end_s,audioset_positive_labels,aspect_list,caption,author_id,is_balanced_subset,is_audioset_eval
-0Gj8-vB1q4,30,40,"/m/0140xf,/m/02cjck,/m/04rlf","['low quality', 'sustained strings melody', 'soft female vocal', 'mellow piano melody', 'sad', 'soulful', 'ballad']","The low quality recording features a ballad song that contains sustained strings, mellow piano melody and soft female vocal singing over it. It sounds sad and soulful, like something you would hear at Sunday services.",4,False,True
-0SdAVK79lg,30,40,"/m/0155w,/m/01lyv,/m/0342h,/m/042v_gx,/m/04rlf,/m/04szw,/m/07s0s5r,/m/0fx80y,/m/0gg8l","['guitar song', 'piano backing', 'simple percussion', 'relaxing melody', 'slow tempo', 'bass', 'country feel', 'instrumental', 'no voice']",This song features an electric guitar as the main instrument. The guitar plays a descending run in the beginning then plays an arpeggiated chord followed by a double stop hammer on to a higher note and a descending slide followed by a descending chord run. The percus

simonw

body {
  background-attachment: fixed;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100%25' height='100%25' viewBox='0 0 1600 800'%3E%3Cg %3E%3Cpath fill='%230e009d' d='M486 705.8c-109.3-21.8-223.4-32.2-335.3-19.4C99.5 692.1 49 703 0 719.8V800h843.8c-115.9-33.2-230.8-68.1-347.6-92.2C492.8 707.1 489.4 706.5 486 705.8z'/%3E%3Cpath fill='%230700a4' d='M1600 0H0v719.8c49-16.8 99.5-27.8 150.7-33.5c111.9-12.7 226-2.4 335.3 19.4c3.4 0.7 6.8 1.4 10.2 2c116.8 24 231.7 59 347.6 92.2H1600V0z'/%3E%3Cpath fill='%230001ac' d='M478.4 581c3.2 0.8 6.4 1.7 9.5 2.5c196.2 52.5 388.7 133.5 593.5 176.6c174.2 36.6 349.5 29.2 518.6-10.2V0H0v574.9c52.3-17.6 106.5-27.7 161.1-30.9C268.4 537.4 375.7 554.2 478.4 581z'/%3E%3Cpath fill='%23000ab3' d='M0 0v429.4c55.6-18.4 113.5-27.3 171.4-27.7c102.8-0.8 203.2 22.7 299.3 54.5c3 1 5.9 2 8.9 3c183.6 62 365.7 146.1 562.4 192.1c186.7 43.7 376.3 34.4 557.9-12.6V0H0z'/%3E%3Cpath fill='%230014BA' d='M181.8 259.4c98.2 6 191.9 35.2 281.3 72.1c2.8 1.1 5.

simonw

simonw

simonw

CREATE TABLE posts (
  id INTEGER PRIMARY KEY,
  title TEXT NOT NULL,
  content TEXT NOT NULL
);

CREATE TABLE comments (
  id INTEGER PRIMARY KEY,
  content TEXT NOT NULL,
  post_id INTEGER NOT NULL,

simonw

Stream Mastodon activity into a SQLite database

This script subscribes to the live HTTP feed of public activity on my Mastodon instance and writes the results into SQLite database tables.

It needs sqlite-utils and httpx:

pip install sqlite-utils httpx

Then run:

simonw

databases:
  fixtures:
    allow:
      id: root