ubuntu安装python3.7

把所有步骤浓缩在一起，一键执行，只需要修改下面的3.6版本为原始版本即可

sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
sudo apt-get install build-essential python-dev python-setuptools python-pip python-smbus
sudo apt-get install build-essential libncursesw5-dev libgdbm-dev libc6-dev
sudo apt-get install zlib1g-dev libsqlite3-dev tk-dev
sudo apt-get install libssl-dev openssl
sudo apt-get install libffi-dev
wget https://www.python/ftp/python/3.7.1/Python-3.7.1.tgz
tar -zxvf Python-3.7.1.tgz
cd Python-3.7.1
./configure --prefix=/usr/local/python3.7.1
make
sudo make install
PATH=$PATH:$HOME/bin:/usr/local/python3.7.1/bin
ls -l /usr/bin | grep python
rm /usr/bin/python 
ln -s /usr/bin/python3.6 /usr/bin/python
mv /usr/bin/python /usr/bin/python.bak
ln -s /usr/local/python3.7.1/bin/python3.7 /usr/bin/python
mv /usr/bin/pip /usr/bin/pip.bak
ln -s /usr/local/python3.7.1/bin/pip3 /usr/bin/pip