Vpod Python SDK
A lightweight, portable sandbox that gives an untrusted process an instant Linux environment.
It uses a RISC‑V architecture and runs entirely inside WebAssembly.
- Fast startup : Boot in under a second.
- Portable : Runs anywhere without any setup required.
- Isolated : All execution state stays inside the WASM sandbox.
Installation
pip install vpod
Usage
Persistent session (Recommended)
All calls share the same running sandbox. Using a context manager (with) automatically cleans up resources when done:
from vpod import Sandbox
with Sandbox.create() as sbx:
sbx.commands.run("export FOO=bar")
sbx.commands.run("touch /tmp/data.csv")
result = sbx.commands.run("echo $FOO")
print(result.stdout) # bar
Python REPL
Run Python code with persistent state across calls. Variables and imports persist for the lifetime of the session.
from vpod import Sandbox
with Sandbox.create() as sbx:
sbx.code.run("import requests")
sbx.code.run("data = [1, 2, 3]")
result = sbx.code.run("print(sum(data))")
print(result.text) # 6
Advanced Configuration
You can mount local directories into the sandbox and specify which snapshot to use.
from vpod import Sandbox
# Mount a local workspace and use a snapshot with pre-installed data science tools
mounts = {"workspace": "/workspace:rw"}
with Sandbox.create(snapshot="vsnap-data", mounts=mounts) as sbx:
sbx.code.run("import pandas as pd")
sbx.code.run("print('Pandas is ready!')")
Suspend & Resume
Pause a running sandbox and resume it later — no daemon, no background process. Only dirty memory pages are saved, making it fast and storage-efficient.
from vpod import Sandbox
with Sandbox.create() as sbx:
sbx.commands.run("uv pip install --system requests")
instance_id = sbx.suspend()
# Later (even from a new process):
sbx = Sandbox.resume(instance_id)
sbx.code.run("import requests; print(requests.__version__)")
| Method | Description |
|---|---|
sandbox.suspend() |
Suspend to disk, returns instance ID |
Sandbox.resume(id) |
Resume a suspended instance |
Sandbox.list_instances() |
List all instances |
Sandbox.destroy(id) |
Delete a suspended instance from disk |
Shell commands (stateless)
If you just need a quick one-off execution without preserving state:
from vpod import Sandbox
sbx = Sandbox.create()
result = sbx.commands.run("echo hello")
print(result.stdout) # hello
sbx.close() # Clean up the sandbox process
Snapshots
The first call to Sandbox.create() downloads the snapshot and caches it locally. Subsequent calls use the cache instantly.
To pre-download (e.g. in a Dockerfile or CI setup):
from vpod import snapshots
for s in snapshots.catalog():
print(s["name"], s["tag"])
snapshots.pull("alpine:latest")
Available Snapshots
| Name | Tag | Description | Memory Limit (RAM) |
|---|---|---|---|
alpine |
3.23.0 | Minimal Alpine Linux snapshot. | 256 MB |
vsnap-base |
0.1.0 | Alpine-based general-purpose snapshot with Python. | 256 MB |
vsnap-base-512mb |
0.1.0 | Same as vsnap-base with more memory headroom, for web servers and larger installs. |
512 MB |
vsnap-data |
0.1.0 | Alpine-based snapshot with numpy, pandas, and scipy. |
512 MB |
Documentation
Visit the Vpod documentation for the full guide and API reference. To report issues or contribute, head to the main GitHub repository.
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