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isolate

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library0.26.9pypypi✓ verified 82d ago

Isolate offers a pluggable end-to-end solution for building, managing, and using isolated environments (virtualenv, conda, remote, and more). While directly installable, its primary utility for most users is realized as an underlying component of the fal.ai platform, enabling serverless execution of Python functions with specified dependencies in isolated cloud environments. The current version is 0.25.7, and the project appears to have an active release cadence, with version 0.25.6 uploaded to PyPI in early April 2026.

pip install isolate
INSTALL
IMPORT
SIG · ISOLATE
I
isolate
devopspythonv0.26.9
Install
3.2s avg
Import
Disk
38MB
Pass rate
10/ 10
Env Coverage10 / 10
glibc
3.93.13
musl
3.93.13
Install & Compatibility
Where this runs
tested against v0.26.9 · pip install
no network on importno background threads
Install × environment matrix
Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux
musl
py 3.103.920 runs
installs and imports cleanly · install 0.0s · import 0.000s · 41MB
glibc
py 3.103.920 runs
installs and imports cleanly · install 3.2s · import 0.000s · 39MB
38MB installed
● package 38MB
Code
Verified usage

Verified import paths — ran on the pinned version, not inferred.

prepare_environment
from isolate import prepare_environment
import fal
registry
from isolate import registry
import fal
version_tuple
from isolate import version_tuple
import fal

This quickstart demonstrates how the `fal` library, which utilizes `isolate` internally, allows users to define and run Python functions in isolated environments with specified dependencies. The `@fal.function` decorator handles the environment setup, including dependency installation, making the underlying isolation seamless to the developer. Direct usage of the `isolate` library's API is not a common pattern for end-users.

import fal import os @fal.function( "virtualenv", requirements=["pyjokes"], # For authentication, fal_client typically picks up FAL_KEY from environment variables # or 'fal auth login'. For this example, we assume it's set. # For a runnable quickstart, replace os.environ.get with your actual key if testing locally # fal_client is not directly used here, but implicitly by fal.function for deployment. ) def tell_joke() -> str: import pyjokes joke = pyjokes.get_joke() return joke # To run this, you would typically use the fal CLI after saving to a file (e.g., my_app.py): # fal run my_app.py::tell_joke # The output would be the joke returned by the function, executed in an isolated environment. # This code snippet demonstrates how 'fal' (which uses 'isolate' internally) # enables running a Python function with specific dependencies in an isolated environment. # Direct invocation of 'isolate' classes/functions is not a common user pattern. print('Function defined. To run, use `fal run <filename>::tell_joke` after `pip install fal` and `fal auth login`.')
isolate --version
Debug
Known issues
gotchaThe `isolate` library (fal-ai/isolate) is primarily an internal component of the `fal.ai` platform. Most users will interact with its functionality indirectly through the `fal` Python library and CLI, rather than directly importing and using `isolate` classes or functions. Direct API stability for standalone use may not be a high priority for its maintainers.
fix
For isolated execution of Python functions, especially in a serverless context, refer to the `fal` (fal-ai/fal) library's documentation and quickstarts. Install `fal` and use its provided decorators and client for managing environments.
affects: All versions
gotchaConfusion with other similarly named libraries (e.g., `isolated-environment`, `run-isolated`) is possible due to the generic nature of the name. Ensure you are referencing `fal-ai/isolate` when investigating this specific project.
fix
Always verify the PyPI project page (pypi.org/project/isolate) and the official GitHub repository (github.com/fal-ai/isolate) to confirm you are using the correct library and its documentation.
affects: All versions
gotchaWhile `isolate` provides core isolation capabilities, deploying functions to remote or cloud environments (as often intended with the `fal` ecosystem) requires authentication. Users will need to set up `FAL_KEY` environment variables or use `fal auth login` to authenticate their `fal` client.
fix
Ensure that the `fal` CLI is installed and configured with appropriate authentication credentials (`fal auth login` or `export FAL_KEY=...`) when deploying or running functions remotely via `fal`.
affects: All versions
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Version history
0.26.9latest on PyPI · released Jun 9, 2026
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Dependencies

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Agent activity
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Resources
isolate — pip install isolate · libregistry