安装
linux 安装请参考官方文档
$ sudo mv pycharm-professional-4.0.1.tar.gz /opt/
$ cd /opt/
$ sudo tar -xzvf /opt/pycharm-professional-4.0.1.tar.gz
$ sudo rm pycharm-professional-4.0.1.tar.gz
$ sudo ln -s /opt/pycharm-4.0.1/bin/pycharm.sh /usr/bin/pycharm
杂乱问题集
bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?
当试图用 BeautifulSoup 解析网页为 lxml 格式时，提示如下（系统 OS X EI Capitan 10.11.6 (15G31)）：
Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?
可能是缺少相应的解释环境，只要打开 Preferences -> Project: XXX（XXX 是工程名）->Project Interpreter 改变解释器，或添加需要的 Packages
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