Question

操作系统：Ubuntu 16.04 Python 2.7

pip list | grep gev
DEPRECATION: The default format will switch to columns in the future. You can use --format=(legacy|columns) (or define a format=(legacy|columns) in your pip.conf under the [list] section) to disable this warning.
gevent (1.3a2)

为了确保，我检查了一下：

  pip install --upgrade gevent
Requirement already up-to-date: gevent in /home/user/.local/lib/python2.7/site-packages
Requirement already up-to-date: greenlet>=0.4.13; platform_python_implementation == "CPython" in /home/user/.local/lib/python2.7/site-packages (from gevent)

然而，当我实际运行我的python程序时，它会出现错误：

 import gevent
ImportError: No module named gevent

请告知。

我尝试过的东西：

pip --version
pip 9.0.1 from /home/user/.local/lib/python2.7/site-packages (python 2.7)


python -m pip install --user gevent
Requirement already satisfied: gevent in /home/user/.local/lib/python2.7/site-packages
Requirement already satisfied: greenlet>=0.4.13; platform_python_implementation == "CPython" in /home/user/.local/lib/python2.7/site-packages (from gevent)

which -a python
/usr/bin/python
/usr/bin/python

以及这里提到的事情： https://github.com/PokeAlarm/PokeAlarm/issues/22

我还尝试卸载pip安装并执行apt-get：

sudo apt-get install python-gevent python-gevent-websocket

这里提到：https://askubuntu.com/questions/836029/importerror-no-module-named-gevent/1013457#1013457

Answer 1

确保你的pip引用你正在使用的同一个python，在许多系统上，您可以安装多个python版本。你可以通过运行来查看你的pip属于哪个python：

pip --version

Answer 2

在Ubuntu 16.04中的Python虚拟环境中工作我得到了以下结果：

$ pip install gevent 
Requirement already satisfied: gevent in ./lib/python2.7/site-packages  
Requirement already satisfied: greenlet>=0.4.10 in ./lib/python2.7/site-packages (from gevent)

import gevent在我的Python虚拟环境中成功运行，但在运行以下命令之前，它在我的Python虚拟环境之外无效：

sudo apt install python-gevent # also works in all currently supported versions of Ubuntu

描述：gevent是一个基于协程的Python网络库。 gevent使用greenlet在libevent事件循环之上提供高级同步API。

Answer 3

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转到 anaconda navigator 并选择您正在工作的环境...然后选择未安装，检查 gevent 并安装

没有名为gevent的模块，即使它已安装

3 个答案: