fab-classic

library1.21.0pypypi✓ verified 85d ago

fab-classic is a maintained fork of the original Fabric 1.x line, providing a simple, Pythonic tool for remote execution and deployment via SSH. The current version is 1.21.0, with quarterly releases and support for Python 3.5+.

devops http-networking

pip install fab-classic

github ↗package ↗

INSTALL

IMPORT

SIG · FAB-CLASSIC

fab-classic

devopspythonv1.21.0

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

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

run

✓ from fabric.api import run

✗ from fabric import run

Fabric 2/3 uses 'from fabric import Connection'; classic uses fabric.api.

Minimal remote command execution using fabric.api.

from fabric.api import run, env, cd env.host_string = 'example.com' env.user = 'user' with cd('/var/www'): run('ls -la') run('uname -a')

fab --version

Debug

Known issues

breakingPython 2.7 support dropped in 1.20.0

fix

Upgrade to Python 3.5+ or pin fab-classic<1.20.0.

affects: <1.20.0

gotchaParallel mode may hang on macOS Python 3.8+ without explicit fork context. Use env.parallel = True with caution.

fix

Set multiprocessing context to 'fork': import multiprocessing as mp; mp.set_start_method('fork') before using --parallel.

affects: 1.20.0+

deprecatedparamiko-ng is no longer supported by default; use upstream paramiko.

fix

Ensure paramiko (not paramiko-ng) is installed.

affects: >=1.21.0

gotchalocal() capture behavior changed in 1.19.0; failing commands with capture=False no longer raise SystemExit.

fix

Check return code explicitly if using capture=False.

affects: >=1.19.0

Errors

Common errors & fixes

ImportError: No module named fabric.api

Installed Fabric 2+ (fabric3) instead of fab-classic.

fix

Uninstall fabric/fabric3 and install fab-classic: pip uninstall fabric; pip install fab-classic.

paramiko.ssh_exception.SSHException: Error reading protocol banner

Network issue or server drops connection early.

fix

Increase timeout or retry: env.timeout = 30; env.connection_attempts = 3.

TypeError: _pty_size() got an unexpected keyword argument 'height'

Incompatible with Python 3.14 (struct buffer size change).

fix

Upgrade to fab-classic>=1.20.2.

Upgrade

Version history

1.21.0latest on PyPI · released Mar 30, 2026

Audit

Dependencies

paramikorequiredCore SSH transport (upstream, not paramiko-ng)

Agent activity

9 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/ploxiln/fab-classic ↗

packagehttps://pypi.org/project/fab-classic/ ↗