eric
这回安装eric，前面觉得linux mint界面，额……没有那么喜欢吧，想试下其他发行版，结果发现还是linux mint对我的老本lenovo v360支持的好。又折腾回来，结果在安装Eric的时候，各种出错，明明更新了pip，包也提前下载好了，结果在安装的时候依然提示包不存在，无法安装。这个我放在最后说，先来正确的步骤。
部分内容参考：https://www.52pojie.cn/thread-1010915-1-1.html
1、下载eric
官方地址：http://eric-ide.python-projects.org/
下载地址：http://eric-ide.python-projects.org/eric-download.html
下载地址页面有一个大大的Download，应该都能找到。
下载有些慢，可以考虑使用aria2下载，会快一些
2.安装qt组件
sudo apt install qt5-default qttools5-dev-tools
3.安装eric依赖
python3 -m pip install <包名>
建议用以上命令先将eric相关依赖安装
4.解压eric
放在一个目录，建议/opt
sudo mv <eric目录> /opt
5.进入eric目录，并安装
sudo python3 install.py
下面说说pip 的事儿，前面安装的时候是这个样子的：
python3 ./install.py Checking dependencies Python Version: 3.6.9 Found PyQt5 Found pyuic5 PyQtWebEngine could not be detected. Error: cannot import name 'QtWebEngineWidgets' Shall 'PyQtWebEngine' be installed using pip? (Y/n) y Defaulting to user installation because normal site-packages is not writeable Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple Requirement already satisfied: PyQtWebEngine in /usr/local/lib/python3.6/dist-packages (5.14.0) Requirement already satisfied: PyQt5-sip<13,>=12.7 in /home/lee/.local/lib/python3.6/site-packages (from PyQtWebEngine) (12.7.2) Requirement already satisfied: PyQt5>=5.14 in /home/lee/.local/lib/python3.6/site-packages (from PyQtWebEngine) (5.14.2) PyQtChart could not be detected. Error: cannot import name 'QtChart' Shall 'PyQtChart' be installed using pip? (Y/n) y Defaulting to user installation because normal site-packages is not writeable Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple Requirement already satisfied: PyQtChart in /usr/local/lib/python3.6/dist-packages (5.14.0) Requirement already satisfied: PyQt5-sip<13,>=12.7 in /home/lee/.local/lib/python3.6/site-packages (from PyQtChart) (12.7.2) Requirement already satisfied: PyQt5>=5.14 in /home/lee/.local/lib/python3.6/site-packages (from PyQtChart) (5.14.2) QScintilla could not be detected. Error: cannot import name 'Qsci' Shall 'QScintilla' be installed using pip? (Y/n) y Sorry, please install QScintilla2 and its PyQt5 wrapper. Error: QScintilla could not be installed.
就是明明已经用pip安装，但在安装eric的时候，就是提示不对，没有依据，但估计是linux自带多个版本python，在安装pip时多个版本之间的问题。
解决问题的方法就是使用pip的时候，通过python -m调用，使用python的版本选择pip的版本
python -m pip install #对应python2.X的pip python3 -m pip install #对应python3.X的pip
建议先使用pip安装完相关依赖安装，再安装eric。
在安装过程中，会提示下面的内容。
WARNING: The scripts pylupdate5, pyrcc5 and pyuic5 are installed in '/home/lee/.local/bin' which is not on PATH. Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
需要修改/etc/profile，将相关路径加入path
方法参见链接，这个是修改JAVA_HOME的PATH https://www.cnblogs.com/jpfss/p/7895944.html
把要加入path的路径起个名字就行了。