使用 python 处理来自另一个脚本的交互式脚本

Question

我有一个 shell 脚本，这个脚本是交互式的，我正在创建一些自动化来为这个 shell 脚本提供输入。自动化是使用 Python 完成的。例如，

shell 脚本等待诸如“域名是什么？”之类的输入。 现在 python 应该能够提供输入并按 ENTER。

请通过一些示例提供处理此类会话的解决方案。

Answer 1

期待：http://pypi.python.org/pypi/pexpect/

它带有一堆示例。例如这个用于 ftp：

import pexpect
import sys

child = pexpect.spawn('ftp ftp.openbsd.org')
child.expect('(?i)name .*: ')
child.sendline('anonymous')
child.expect('(?i)password')
child.sendline('pexpect@sourceforge.net')
child.expect('ftp> ')
child.sendline('cd /pub/OpenBSD/3.7/packages/i386')
child.expect('ftp> ')
child.sendline('bin')
child.expect('ftp> ')
child.sendline('prompt')
child.expect('ftp> ')
child.sendline('pwd')
child.expect('ftp> ')
print("Escape character is '^]'.\n")
sys.stdout.write (child.after)
sys.stdout.flush()
child.interact() # Escape character defaults to ^]
# At this point this script blocks until the user presses the escape character
# or until the child exits. The human user and the child should be talking
# to each other now.

# At this point the script is running again.
print 'Left interactve mode.'

# The rest is not strictly necessary. This just demonstrates a few functions.
# This makes sure the child is dead; although it would be killed when Python exits.
if child.isalive():
    child.sendline('bye') # Try to ask ftp child to exit.
    child.close()
# Print the final state of the child. Normally isalive() should be FALSE.
if child.isalive():
    print 'Child did not exit gracefully.'
else:
    print 'Child exited gracefully.'