在CENTOS7上安装anaconda5.2.0的版本后，要启动spyder，但是出现错误，启动失败：
(base) [dlou@ks0512anaconda01 ~]$ spyder
Traceback (most recent call last):
File "/home/dlou/anaconda3/lib/python3.6/site-packages/qtpy/QtWebEngineWidgets.py", line 22, in <module>
from PyQt5.QtWebEngineWidgets import QWebEnginePage
ImportError: libXss.so.1: cannot open shared object file: No such file or directory
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/dlou/anaconda3/bin/spyder", line 11, in <module>
sys.exit(main())
File "/home/dlou/anaconda3/lib/python3.6/site-packages/spyder/app/start.py", line 159, in main
from spyder.app import mainwindow
File "/home/dlou/anaconda3/lib/python3.6/site-packages/spyder/app/mainwindow.py", line 92, in <module>
from qtpy import QtWebEngineWidgets # analysis:ignore
File "/home/dlou/anaconda3/lib/python3.6/site-packages/qtpy/QtWebEngineWidgets.py", line 26, in <module>
from PyQt5.QtWebKitWidgets import QWebPage as QWebEnginePage
ModuleNotFoundError: No module named 'PyQt5.QtWebKitWidgets'
处理方法：
从网上下载以下安装包：
PyQt5-5.12.1-5.12.2-cp35.cp36.cp37.cp38-abi3-manylinux1_x86_64.whl
PyQtWebEngine-5.12.1-5.12.9-cp35.cp36.cp37.cp38-abi3-manylinux1_x86_64.whl
安装PyQt5的时候提示需要PyQt5_sip，因此又下载了以下安装包：
PyQt5_sip-4.19.19-cp36-cp36m-manylinux1_x86_64.whl
依次安装：
(base) [dlou@ks0512anaconda01 Downloads]$ pip install PyQt5_sip-4.19.19-cp36-cp36m-manylinux1_x86_64.whl
Processing ./PyQt5_sip-4.19.19-cp36-cp36m-manylinux1_x86_64.whl
distributed 1.21.8 requires msgpack, which is not installed.
Installing collected packages: PyQt5-sip
Successfully installed PyQt5-sip-4.19.19
(base) [dlou@ks0512anaconda01 Downloads]$ pip install PyQt5-5.12.1-5.12.2-cp35.cp36.cp37.cp38-abi3-manylinux1_x86_64.whl
Processing ./PyQt5-5.12.1-5.12.2-cp35.cp36.cp37.cp38-abi3-manylinux1_x86_64.whl
Requirement already satisfied: PyQt5_sip<4.20,>=4.19.14 in /home/dlou/anaconda3/lib/python3.6/site-packages (from PyQt5==5.12.1) (4.19.19)
distributed 1.21.8 requires msgpack, which is not installed.
Installing collected packages: PyQt5
Successfully installed PyQt5-5.12.1
(base) [dlou@ks0512anaconda01 Downloads]$ pip install PyQtWebEngine-5.12.1-5.12.9-cp35.cp36.cp37.cp38-abi3-manylinux1_x86_64.whl
Processing ./PyQtWebEngine-5.12.1-5.12.9-cp35.cp36.cp37.cp38-abi3-manylinux1_x86_64.whl
Requirement already satisfied: PyQt5>=5.12 in /home/dlou/anaconda3/lib/python3.6/site-packages (from PyQtWebEngine==5.12.1) (5.12.1)
Requirement already satisfied: PyQt5_sip<4.20,>=4.19.14 in /home/dlou/anaconda3/lib/python3.6/site-packages (from PyQt5>=5.12->PyQtWebEngine==5.12.1) (4.19.19)
distributed 1.21.8 requires msgpack, which is not installed.
Installing collected packages: PyQtWebEngine
Successfully installed PyQtWebEngine-5.12.1
虽然有错误提示，执行spyder，可以正常启动。