debian下安装python3

按照以下步骤装，就行了！

apt-get update

apt-get install build-essential -y
apt-get install libncurses5-dev libncursesw5-dev libreadline6-dev -y
apt-get install libdb5.3-dev libgdbm-dev libsqlite3-dev libssl-dev -y
apt-get install libbz2-dev libexpat1-dev liblzma-dev zlib1g-dev -y
wget http://mirrors.sohu.com/python/3.5.1/Python-3.5.1.tgz
tar xzvf Python-3.5.1.tgz
cd Python-3.5.1
./configure --prefix=/usr/local/python35
make all
make install

vim ~/.bashrc

在最后一行添加export PATH=$PATH:/usr/local/python35/bin 

保存后source ~/.bashrc

输入 python3,可以看到现在的版本是3.5.1。

# 以下快捷方式 替换
$ sudo rm /usr/bin/python /usr/bin/python2
$ sudo ln -s /usr/local/python35/bin/python3.5 /usr/bin/python
$ sudo ln -s /usr/local/python35/bin/pip3 /usr/bin/pip


pip3  install --upgrade pip
pip3 install numpy
pip3 install pandas