Python 导入错误：没有名为 pexpect 的模块
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ImportError: No module named pexpect
提问by mitchkman
I am using Fabric and would like to use fexpect. I have the following Python script:
我正在使用 Fabric 并想使用 fexpect。我有以下 Python 脚本：
from ilogue.fexpect import expect, expecting, run
(...)
def install_postgresql(profile):
print("!!! Installing PostgreSQL...")
print(' -> Doing pre-cleanup...')
# Remove PostgreSQL if it exists
prompts = []
prompts += expect('Do you want to continue [Y/n]? ', 'Y')
with settings(warn_only=True):
with expecting(prompts):
run('sudo apt-get purge postgresql')
print(' -> Doing actual installation...')
# Install PostgreSQL
prompts = []
prompts += expect('Do you want to continue [Y/n]? ', 'Y')
with expecting(prompts):
run('sudo apt-get install postgresql')
# In some cases PostgreSQL has issues with Ubuntu's default kernel params
# that prevent PostgreSQL to start automatically, so we try to start it
# TODO: Fix it
with settings(warn_only=True):
run('sudo service postgresql start')
When executing I get the following error:
执行时出现以下错误：
[xxx.xxx.xxx.xxx] out: Traceback (most recent call last):
[xxx.xxx.xxx.xxx] out: File "/tmp/fexpect_MbW3QP6Zpy5KBjBGQcaYxi", line 4, in <module>
[xxx.xxx.xxx.xxx] out: import pexpect
[xxx.xxx.xxx.xxx] out: ImportError: No module named pexpect
I am using virtualenv and pexpect is actually installed:
我正在使用 virtualenv 并且实际安装了 pexpect：
(venv)PALM00545424A:woopup i841712$ pip install pexpect
Requirement already satisfied (use --upgrade to upgrade): pexpect in ./venv/lib/python2.7/site-packages
采纳答案by mitchkman
Found the solution.
找到了解决办法。
pexpect was not part of the remote machine's Python installation.
pexpect 不是远程机器的 Python 安装的一部分。
I simply executed
我只是执行
sudo -E pip install pexpect
on the remote machine.
在远程机器上。
回答by Ramashish Baranwal
Not a direct answer to your question, but tools like chef, puppet or salt are more suitable for installing system packages.
不是直接回答您的问题，但是像chef、puppet 或salt 这样的工具更适合安装系统包。
回答by Alexandre Mazel
In fact if your script uses fexcept, the command you need to run is actually:
事实上，如果你的脚本使用了 fexcept，你需要运行的命令实际上是：
sudo -E pip install fexpect
