title: how to make run Flask in Pythonista iOS?
body: <p>I am using Pythonista app on iOS and I cant make Flask module work even with the most basic code. </p>
  
  <p>my code is :</p>
  
  <pre class="lang-py prettyprint-override"><code>from flask import Flask
  
  Flaskapp = Flask(__name__)
  
  @Flaskapp.route('/')
  def helloWorld():
    return 'Woala'
  
  Flaskapp.run(debug=True)
  </code></pre>
  
  <p>but keep receiving: </p>
  
  <pre class="lang-py prettyprint-override"><code>* Serving Flask app "app" (lazy loading)
  * Environment: production
    WARNING: This is a development server. Do not use it in a production deployment.
    Use a production WSGI server instead.
  * Debug mode: on
  * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
  * Restarting with stat
  Traceback (most recent call last):
   File "/private/var/mobile/Library/Mobile Documents/iCloud~com~omz-software~Pythonista3/Documents/app.py", line 9, in &lt;module&gt;
     Flaskapp.run(debug=True)
   File "/private/var/mobile/Containers/Shared/AppGroup/C4F03A05-D634-4F19-865F-6072E8D6DC38/Pythonista3/Documents/site-packages-3/flask/app.py", line 990, in run
     run_simple(host, port, self, **options)
   File "/private/var/mobile/Containers/Shared/AppGroup/C4F03A05-D634-4F19-865F-6072E8D6DC38/Pythonista3/Documents/site-packages-3/werkzeug/serving.py", line 1007, in run_simple
     run_with_reloader(inner, extra_files, reloader_interval, reloader_type)
   File "/private/var/mobile/Containers/Shared/AppGroup/C4F03A05-D634-4F19-865F-6072E8D6DC38/Pythonista3/Documents/site-packages-3/werkzeug/_reloader.py", line 332, in run_with_reloader
     sys.exit(reloader.restart_with_reloader())
   File "/private/var/mobile/Containers/Shared/AppGroup/C4F03A05-D634-4F19-865F-6072E8D6DC38/Pythonista3/Documents/site-packages-3/werkzeug/_reloader.py", line 176, in restart_with_reloader
     exit_code = subprocess.call(args, env=new_environ, close_fds=False)
   File "/var/containers/Bundle/Application/E373BC34-F149-4EF5-9D0E-5CD807AB0771/Pythonista3.app/Frameworks/Py3Kit.framework/pylib/subprocess.py", line 268, in call
     with Popen(*popenargs, **kwargs) as p:
   File "/var/containers/Bundle/Application/E373BC34-F149-4EF5-9D0E-5CD807AB0771/Pythonista3.app/Frameworks/Py3Kit.framework/pylib/subprocess.py", line 708, in __init__
     restore_signals, start_new_session)
   File "/var/containers/Bundle/Application/E373BC34-F149-4EF5-9D0E-5CD807AB0771/Pythonista3.app/Frameworks/Py3Kit.framework/pylib/subprocess.py", line 1261, in _execute_child
     restore_signals, start_new_session, preexec_fn)
  PermissionError: [Errno 1] Operation not permitted
  </code></pre>
  
  <p>I have already installed flask trough pip in launch_stash.py</p>