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# Install requirements
apt-get install -y build-essential checkinstall libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev zlib1g-dev openssl libffi-dev python3-dev python3-setuptools wget

# Prepare to build
mkdir /tmp/Python37
cd /tmp/Python37

# Pull down Python 3.7, build, and install
wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tar.xz
tar xvf Python-3.7.0.tar.xz
cd /tmp/Python37/Python-3.7.0
./configure
make altinstall

https://serverfault.com/questions/918335/best-way-to-run-python-3-7-on-ubuntu-16-04-which-comes-with-python-3-5