Python Pexpect For Windows
I want to write a python program for connect to remote server (using ssh) and execute the command and return back with output. Here is my code: import sys import os from subprocess import Popen, PIPE, STDOUT from time import sleep from os import waitpid, execv, read, write #Ports are handled in. 'Pexpect is a Python module for spawning child applications and controlling: them automatically. Pexpect can be used for automating interactive applications. Pexpect — Spawn child applications and control them automatically.¶. Pexpect is a Python module for spawning child applications and controlling them automatically. Pexpect can be used for automating interactive applications such as ssh, ftp, passwd, teln. Pexpect Documentation, Release 4.7 Pexpect makes Python a better tool for controlling other applications. 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. Pexpect version 4.7¶. Pexpect makes Python a better tool for controlling other applications. Pexpect is a pure Python module for spawning child applications; controlling them; and responding to expected patterns in their output. Libes' Expect, but Pexpect is pure Python. Other Expect-like modules for Python: require TCL and Expect or require C extensions to be compiled. Pexpect does not: use C, Expect, or TCL extensions. It should work on any platform that supports: the standard Python pty module. The Pexpect interface focuses on ease of use so: that simple tasks are easy.
Pexpect – spawn a child application and control it as if a human were typing commands. Three libraries have used different approach to gain access to ssh, and finally I choose pexpect for the simplicity. This post will briefly shows you how easy you can access ssh with pexpect lib.
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I'm trying to write a cross-platform tool that runs specific commands, expects certain output for verification, and sends certain output (like username/password) for authentication.
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On Unix, I have been successful in programming a Python tool that uses the pexpect library (via pip install pexpect). This code works perfectly and is exactly what I am trying to do. I've provided a small excerpt of my code for proof-of-concept below:
I tried running the same source on Windows (changing /usr/bin/ctf to c:/ctf.exe) and I receive an error message:
According to the pexpectdocumentation:
pexpect.spawn and pexpect.run() are not available on Windows, as they rely on Unix pseudoterminals (ptys). Cross platform code must not use these.
That led me on my search for a Windows equivalent. I have tried the popular winpexpect project here and even a more recent (forked) version here, but neither of these projects seem to work. I use the method:
only to sit and watch the Command Prompt do nothing (it seems as though it's trapped inside the winspawn method). I was wondering what other means I could go about programming a Python script to interact with the command line to achieve the same effect as I have been able to in Unix? If a suitable working Windows-version pexpect script does not exist, what other means could I use to go about this?
2 Answers
Instead of using pexpect.spawn you can use pexpect.popen_spawn.PopenSpawn for windows.
You can use wexpect ('Windows alternative of pexpect', Python Software Foundation). It has the same functions, and it works on Windows .
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Pexpect is a Pure Python Expect-like module
Python Pexpect Example Windows
Pexpect makes Python a better tool for controlling other applications.
Python Pexpect For Windows 9
Pexpect is a pure Python module for spawning child applications; controllingthem; and responding to expected patterns in their output. Pexpect works likeDon Libes' Expect. Pexpect allows your script to spawn a child application andcontrol 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 duplicatingsoftware package installations on different servers. It can be used forautomated software testing. Pexpect is in the spirit of Don Libes' Expect, butPexpect is pure Python.
The main features of Pexpect require the pty module in the Python standardlibrary, which is only available on Unix-like systems. Some features—waitingfor patterns from file descriptors or subprocesses—are also available onWindows.
If you want to work with the development version of the source code then pleaseread the DEVELOPERS.rst document in the root of the source code tree.
Pexpect Download
Free, open source, and all that good stuff.
You can install Pexpect using pip:
PEXPECT LICENSE:
This license is approved by the OSI and FSF as GPL-compatible.