pip install --upgrade virtualenv
virtualenv -p /usr/local/bin/python3 py3env
source py3env/bin/activate
$ pip install -r requirements.txt
#compatible with python2 and 3
$ python hello_obp.py
$ python3 hello_payments.py
pip install --upgrade virtualenv
virtualenv -p /usr/local/bin/python3 py3env
source py3env/bin/activate
$ pip install -r requirements.txt
#compatible with python2 and 3
$ python hello_obp.py
$ python3 hello_payments.py