---
id: pexpect
version: "4.9.0"
license: ISC license
license_treatment: permissive
maintenance: aging
---

# pexpect — Pexpect allows easy control of interactive console applications.

License: permissive · Maintenance: aging · Popularity: top 1,000 on PyPI

## Install

pip install pexpect
uv add pexpect
poetry add pexpect

## Description

Pexpect is a pure Python module for spawning child applications; controlling
them; and responding to expected patterns in their output. Pexpect works like
Don Libes' Expect. Pexpect allows your script to spawn a child application and
control it as if a human were typing commands.

Pexpect can be used for automating interactive applications such as ssh, ftp,
passwd, telnet, etc. It can be used to automate setup scripts for duplicating
software package installations on different servers. It can be used for
automated software testing. Pexpect is in the spirit of Don Libes' Expect, but
Pexpect is pure Python.

The main features of Pexpect require the pty module in the Python standard
library, which is only available on Unix-like systems. Some features—waiting
for patterns from file descriptors or subprocesses—are also available on
Windows.

## AI interpretation — verify before relying

Pexpect spawns and controls child applications interactively, automating responses to expected output patterns. It enables scripting of interactive programs like ssh, ftp, and telnet as if a human were typing commands.

Verdict: Pexpect is a stable, well-established library for automating interactive terminal applications. Its permissive ISC license, low install friction, and zero known vulnerabilities make it safe to adopt. The aging maintenance status (992 days since last release) reflects maturity rather than abandonment—the codebase is production-stable and actively maintained. Best suited for Unix-like systems; Windows support is partial.

[View on SkillFed](https://skillfed.io/packages/pexpect) · [View on PyPI](https://pypi.org/project/pexpect/)