Installation editor: Baidu library
https://jingyan.baidu.com/article/335530dafdbb3619cb41c3a8.html
Upgrade:
https://www.cnblogs.com/evablogs/p/7387994.html
python third-party libraries Address:
https://pypi.python.org/pypi/beautifulsoup4/4.3.2
1, if the information is always wrong installed directly
enter the command: install xxx PIP
2, added to the library
installation address: https://jingyan.baidu.com/article/335530dafdbb3619cb41c3a8.html
3, if library plus or wrong, then site search elements related to the package, in the corresponding directory
search address: https://pypi.python.org/pypi/beautifulsoup4/4.3.2
4, re-look at the library are installed (Note: repeat step 2)