title: How do I run a Flask Script from Spyder IDE?
body: <p>In Spyder, I wrote this code.<br>
  Why is it not showing on my browser localhost:5000?</p>
  
  <pre><code>from flask import Flask
  
  app = Flask(__name__)
  
  @app.route('/')
  def index():
      return "Hello World!"
  
  if __name__ == "__main__":
      app.run(debug=True)
  </code></pre>