(venv)$ cat >> requirements.txt << EOF APScheduler==3.0.4 awscli==1.9.11 boto3==1.2.2 botocore==1.3.11 colorama==0.3.3 docutils==0.12 futures==3.0.3 httplib2==0.9 jmespath==0.9.0 pyasn1==0.1.9 python-dateutil==2.4.2 pytz==2015.7 requests==2.8.1 rsa==3.2.3 six==1.10.0 tzlocal==1.2 wheel==0.26.0 EOF (venv)$ pip install -r requirements.txt from apscheduler.schedulers.blocking import BlockingScheduler