python 查看python版本 （自带的一般是2.7）
sudo apt-get autoremove python2.7 卸载2.7 树莓派删除Python2.7 默认Python3.7
https://blog.csdn.net/liqiancao/article/details/94712863
python -m pip install --upgrade pip 更新pip
pip install pandas -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com
https://blog.csdn.net/wangweiwells/article/details/88374070 pip修复方法
上面只是一点python和pip版本的简单记录，下面才是真正有用的：
树莓派安装pyside2 https://blog.csdn.net/mankaichuang/article/details/105876709
里面有讲更新镜像源，升级pip3 还有一大串指令安装pyside2 在https://forum.qt.io/topic/112813/installing-pyside2-on-raspberry-pi里面有类似的一大段指令。（安装成功，但是好像还是用不了）
I have upgrade pip to 3.6 used pip3.6 instead of pip3
查看pyside2版本
dizzy@dizzy-pc:~$ python
Python 2.7.3 (default, Feb 27 2014, 20:00:17)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import PySide
>>> dir(PySide)
['__all__', '__builtins__', '__doc__', '__file__', '__name__', '__package__', '__path__', '__version__', '__version_info__']
>>> PySide.__version__
'1.1.2'
>>> PySide.QtCore.__version__
'4.8.1'
QT for python 官网 https://wiki.qt.io/Qt_for_Python
spyder支持python3 sudo pip3 install spyder3 安装完后执行spyder3