sudo apt update
sudo apt upgrade
sudo apt install gcc
sudo apt install g++
sudo apt install build-essential checkinstall
sudo apt install libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev

sudo curl -O https://www.python.org/ftp/python/3.7.1/Python-3.7.1.tar.xz

sudo tar Jxvf Python-3.7.1.tar.xz

sudo mkdir /usr/python37

sudo ./configure --enable-optimizations --prefix=/usr/python37
sudo make && make install

sudo vim /etc/profile

export PATH=$PATH:/usr/python37/bin
alias python="python3.7"
alias pip="pip3.7"

vim ~/.bashrc

alias python="python3.7"
alias pip="pip3.7"

sudo ln -s /usr/python37/bin/python3.7 /bin/python
sudo ln -s /usr/python37/bin/pip3.7 /bin/pip

cd ~
mkdir .pip
cd .pip
> pip.conf
vim pip.conf

[global]
index-url = https://pypi.tuna.tsinghua.edu.cn/simple

sudo pip install --upgrade pip