@task
def install_python_dependencies(context, force=False):
    """
    Install Python dependencies listed in requirements.txt.
    """
    log.info("Installing project dependencies...")
    context.run("pip install -r app/requirements.txt %s" % ('--upgrade' if force else ''))
    log.info("Project dependencies are installed.")
dataset/ETHPy150Open frol/flask-restplus-server-example/tasks/app/dependencies.py/install_python_dependencies/original