def create_app(app_name):
    app = Flask(app_name)
    _config_app(app)
    _config_ext(app)
    _set_blueprints(app)

    return app
Get version info from the given file. It can be any of:
dataset/ETHPy150Open CelloCello/flask-go/flask_go/project_template/project_name/project_name.py/create_app--crossover with--dataset/ETHPy150Open an0/Letterpress/code/markdown2/tools/cutarelease.py/_parse_version_file