centos快速查找缺少的库所对应的包

问题

在使用python中经常会遇到启动时缺少库文件，一般只能google或百度查找解决办法，实际有更好的解决方法使用yum即可解决。

解决方案

1.错误复现

启动一个python服务时报错如下

# python3.6 server.py 

 __init__ running time: 4.500990152359009 secs. 
Traceback (most recent call last):
  File "server.py", line 24, in <module>
    application = create_app()
  File "/xdfapp/apps/ocr-svr/okay_ocr_svr/__init__.py", line 10, in create_app
    from okay_ocr_svr.apps.question import question_blueprint
  File "/xdfapp/apps/ocr-svr/okay_ocr_svr/apps/question/__init__.py", line 6, in <module>
    from . import views
  File "/xdfapp/apps/ocr-svr/okay_ocr_svr/apps/question/views.py", line 26, in <module>
    from okay_ocr_svr.object_detection.detector import object_detector
  File "/xdfapp/apps/ocr-svr/okay_ocr_svr/object_detection/detector.py", line 12, in <module>
    from okay_ocr_svr.object_detection.opencv import margin_detection  # 边缘检测
  File "/xdfapp/apps/ocr-svr/okay_ocr_svr/object_detection/opencv/margin_detection.py", line 3, in <module>
    import cv2
  File "/usr/lib64/python3.6/site-packages/cv2/__init__.py", line 3, in <module>
    from .cv2 import *
ImportError: libXrender.so.1: cannot open shared object file: No such file or directory

2. 使用yum 查找库所对应的rpm包

# yum whatprovides libXrender.so.1
Loaded plugins: fastestmirror, ovl
Loading mirror speeds from cached hostfile
 * base: mirror.jdcloud.com
 * epel: mirrors.aliyun.com
 * extras: mirror.bit.edu.cn
 * ius: mirrors.tuna.tsinghua.edu.cn
 * updates: mirrors.aliyun.com
libXrender-0.9.10-1.el7.i686 : X.Org X11 libXrender runtime library
Repo        : base
Matched from:
Provides    : libXrender.so.1

3. 安装对应的包即可

# yum -y install libXrender