install python 3.6

# first do:
sudo apt-get update
# after do:
sudo apt-get install python3.6
# then it should be installed

conda create -n myenv python=3.6 #to launch in Anaconda

echo This is for linux. (debian/unbuntu)
sudo apt install build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev wget
curl -O https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tar.xz
tar -xf Python-3.7.4.tar.xz
cd Python-3.7.4
./configure --enable-optimizations
make
sudo make altinstall
python3.7 --version
cd ../

int x = (3+2.7+4+4+4+4+3.7+4)/8;
System.out.println(x);