Hydra flask example

flask-test_.idea_flask-test.iml

<?xml version="1.0" encoding="UTF-8"?>
<module type="PYTHON_MODULE" version="4">
  <component name="NewModuleRootManager">
    <content url="file://$MODULE_DIR$" />
    <orderEntry type="jdk" jdkName="Python 3.8 (test)" jdkType="Python SDK" />
    <orderEntry type="sourceFolder" forTests="false" />
  </component>
</module>

flask-test_.idea_inspectionProfiles_profiles_settings.xml

<component name="InspectionProjectProfileManager">
  <settings>
    <option name="USE_PROJECT_PROFILE" value="false" />
    <version value="1.0" />
  </settings>
</component>

flask-test_.idea_inspectionProfiles_Project_Default.xml

<component name="InspectionProjectProfileManager">
  <profile version="1.0">
    <option name="myName" value="Project Default" />
    <inspection_tool class="DuplicatedCode" enabled="true" level="WEAK WARNING" enabled_by_default="true">
      <Languages>
        <language minSize="49" name="Python" />
      </Languages>
    </inspection_tool>
    <inspection_tool class="PyPackageRequirementsInspection" enabled="true" level="WARNING" enabled_by_default="true">
      <option name="ignoredPackages">
        <value>
          <list size="11">
            <item index="0" class="java.lang.String" itemvalue="omegaconf" />
            <item index="1" class="java.lang.String" itemvalue="protobuf" />
            <item index="2" class="java.lang.String" itemvalue="gorilla" />
            <item index="3" class="java.lang.String" itemvalue="alembic" />
            <item index="4" class="java.lang.String" itemvalue="databricks-cli" />
            <item index="5" class="java.lang.String" itemvalue="querystring_parser" />
            <item index="6" class="java.lang.String" itemvalue="sqlalchemy" />
            <item index="7" class="java.lang.String" itemvalue="Flask" />
            <item index="8" class="java.lang.String" itemvalue="docker" />
            <item index="9" class="java.lang.String" itemvalue="sqlparse" />
            <item index="10" class="java.lang.String" itemvalue="prometheus-flask-exporter" />
          </list>
        </value>
      </option>
    </inspection_tool>
  </profile>
</component>

flask-test_.idea_misc.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="JavaScriptSettings">
    <option name="languageLevel" value="ES6" />
  </component>
</project>

flask-test_.idea_modules.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="ProjectModuleManager">
    <modules>
      <module fileurl="file://$PROJECT_DIR$/.idea/flask-test.iml" filepath="$PROJECT_DIR$/.idea/flask-test.iml" />
    </modules>
  </component>
</project>

flask-test_.idea_workspace.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="ProjectViewState">
    <option name="autoscrollFromSource" value="true" />
    <option name="autoscrollToSource" value="true" />
    <option name="hideEmptyMiddlePackages" value="true" />
    <option name="showExcludedFiles" value="false" />
    <option name="showLibraryContents" value="true" />
  </component>
</project>

flask-test_config.yaml

server:
  host: 127.0.0.1
  port: 8081

app:
  username: ${env:USER}

flask:
  ENV: production
  DEBUG: false
  TESTING: false
  PROPAGATE_EXCEPTIONS: null
  PRESERVE_CONTEXT_ON_EXCEPTION: null
  SECRET_KEY: null
  PERMANENT_SESSION_LIFETIME: datetime.timedelta(days=31)
  USE_X_SENDFILE: false
  SERVER_NAME: null
  APPLICATION_ROOT: /
  SESSION_COOKIE_NAME: session
  SESSION_COOKIE_DOMAIN: null
  SESSION_COOKIE_PATH: null
  SESSION_COOKIE_HTTPONLY: True
  SESSION_COOKIE_SECURE: false
  SESSION_COOKIE_SAMESITE: null
  SESSION_REFRESH_EACH_REQUEST: True
  MAX_CONTENT_LENGTH: null
  SEND_FILE_MAX_AGE_DEFAULT: datetime.timedelta(seconds=43200)
  TRAP_BAD_REQUEST_ERRORS: null
  TRAP_HTTP_EXCEPTIONS: false
  EXPLAIN_TEMPLATE_LOADING: false
  PREFERRED_URL_SCHEME: http
  JSON_AS_ASCII: True
  JSON_SORT_KEYS: True
  JSONIFY_PRETTYPRINT_REGULAR: false
  JSONIFY_MIMETYPE: application/json
  TEMPLATES_AUTO_RELOAD: null
  MAX_COOKIE_SIZE: 4093

hydra:
  # disable changing of cwd as it interferes with flask auto-restart
  run:
    dir: .
  # output files creation
  output_subdir: null

flask-test_hydra_flask.py

import hydra
from omegaconf import DictConfig, OmegaConf, open_dict
from flask import Flask
from flask import current_app

app = Flask(__name__)


@app.route("/")
def hello_world():
    cfg = current_app.config["config"]
    return f"Hello {cfg.app.username}"


@hydra.main(config_name="config")
def main(cfg: DictConfig):
    app.config.from_mapping(cfg.flask)
    with open_dict(cfg):
        del cfg["flask"]
    app.config["config"] = cfg
    app.run(host=cfg.server.host, port=cfg.server.port, debug=True)


if __name__ == "__main__":
    main()