pexpect/pexpect

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

2851 stars · 494 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Pexpect is a pure Python, Expect-like module for spawning and controlling interactive child applications in a pseudo-terminal. It lets scripts respond to expected output patterns as if a human were typing commands, automating tools like ssh, ftp, and passwd.

Use cases

• automate interactive ssh sessions from python
• script password prompts for passwd or ftp
• run automated tests of command-line programs
• control a child process and respond to its output patterns
• automate setup scripts across servers
• drive telnet or other console applications programmatically

When to choose

• you need to automate interactive Unix command-line programs that prompt for input
• you want a pure-Python alternative to Don Libes' Expect
• you are writing automated tests for terminal applications

When to avoid

• you need full functionality on Windows, since pty-based features are Unix-only
• you just need to run non-interactive subprocesses, where subprocess is simpler
• you need to control GUI applications

Facets

library · maturity stable

workflow-automation testing cli developer-tools developer-tools testing python cli expect pseudo-terminal pty process-control interactive-applications automation command-line linux macos

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