On this repo we can found some solved problems of ROSALIND.
Installing packages using pip and a virtual environment:
sudo apt-get install python3-pip
sudo pip3 install virtualenv
virtualenv -p /usr/bin/python3 env/
source ./env/bin/activate
pip install -r requirements.txt
Execute any script of BioInformaticsStronghold folder:
source ./env/bin/activate
python BioInformaticsStronghold/<script-file-name>.py