An example of how to dogfood a Flask API.

app.py

from flask import Flask, url_for
from werkzeug.test import Client
from werkzeug.wrappers import Response

app = Flask(__name__)


@app.route('/bar')
def bar():
    return 'Hello World!'


@app.route('/foo')
def foo():
    api_client = Client(app, Response)
    response = api_client.get(url_for('bar'))
    return response.data