Failed to start mars-pn: Failed to exec docker-compose: exec: "docker-compose": executable file not found in $PATH

IF YOU GOT THESE ERRORS:

ddev composer install

return errors

docker executable file not found in PATH

and

Failed to start mars-pn: Failed to exec docker-compose: exec: "docker-compose": executable file not found in $PATH

and 

docker–compose –version

return

Command 'docker–compose' not found, did you mean:

  command 'docker-compose' from deb docker-compose

Try: sudo apt install <deb name>

FIX error

pyrsistent requires Python '>=3.5' but the running Python is 2.7.17

try to install python 3

install python 3

sudo apt-get -y -qq update
sudo apt-get install python3-pip python3-dev build-essential
sudo pip3 install --upgrade setuptools
sudo pip3 install awsebcli --upgrade

then install

pip3 install docker-compose