最近搬主题新入了一个阿里云的轻量服务器，但是在安装系统的时候突然系统一直提示Plugin"copr"can't be imported，如果是中文的话就显示插件“copr”不能被导入。搬主题也不懂什么情况，好像这个情况就阿里云的Centos7的系统比较常见，搬主题找了很久，最终解决。接下来搬主题分享一下解决办法。问题描述在Centos7.6系统中，使用yum安装的任何系统插件均不能正常使用插件“copr”，比如执行如下命令。yum copr enable ngompa/snapcore-el7系统显示类似如下错误。问题原因其实Python的urllib3模块异常。解决方案登录服务器，执行如下命令，查看目录下的文件。ls /usr/lib/yum-plugins/ 系统显示类似如下，确认有copr.py脚本文件，说明yum-plugin-copr插件安装成功。copr.py copr.pyc copr.pyo fastestmirror.py fastestmirror.pyc fastestmirror.pyo进入/usr/lib/yum-plugins/目录，执行python命令，进入Python终端，然后执行如下命令导入测试。import copr 系统显示类似如下，urllib3模块异常，导致cpor模块导入失败。Traceback (most recent call last):
File "", line 1, in
File "copr.py", line 29, in
import requests
File "/usr/lib/python2.7/site-packages/requests/__init__.py", line 58, in
from . import utils
File "/usr/lib/python2.7/site-packages/requests/utils.py", line 32, in
from .exceptions import InvalidURL
File "/usr/lib/python2.7/site-packages/requests/exceptions.py", line 10, in
from .packages.urllib3.exceptions import HTTPError as BaseHTTPError
File "/usr/lib/python2.7/site-packages/requests/packages/__init__.py", line 95, in load_module
raise ImportError("No module named '%s'" % (name,))
ImportError: No module named 'requests.packages.urllib3'进一步验证，执行如下命令，发生报错，不能正常导入使用。import urllib3 系统显示类似如下，确定是Python的urllib3模块异常，导致yum copr命令使用报错。Traceback (most recent call last):
File "", line 1, in
File "/usr/lib/python2.7/site-packages/urllib3/__init__.py", line 10, in
from .connectionpool import (
File "/usr/lib/python2.7/site-packages/urllib3/connectionpool.py", line 31, in
from .connection import (
File "/usr/lib/python2.7/site-packages/urllib3/connection.py", line 45, in
from .util.ssl_ import (
File "/usr/lib/python2.7/site-packages/urllib3/util/__init__.py", line 4, in
from .request import make_headers
File "/usr/lib/python2.7/site-packages/urllib3/util/request.py", line 5, in
from ..exceptions import UnrewindableBodyError
ImportError: cannot import name UnrewindableBodyError退出Python终端，进入/usr/lib/python2.7/site-packages/目录cd /usr/lib/python2.7/site-packages/把urllib3相关的目录都进行备份。然后都删除，如下，将这些文件夹都删除执行如下命令，重新安装urllib3模块。pip install urllib3再次执行python命令进入Python终端，执行如下命令，导入urllib3模块，确认没有报错。也就是没有任何报错出来。import urllib3按Ctrl+D组合键退出Python终端，执行yum copr命令无异常。插件已经正常加载，没有报错了。
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