gistfile1.txt

>>> from flask import Flask
>>> from flask import g
>>> app=Flask('test')
>>> with app.app_context():
...     g.e='test'
...
>>> with app.app_context():
...     print(g.e)
...
Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
  File "/usr/local/lib/python3.6/site-packages/werkzeug/local.py", line 347, in __getattr__
    return getattr(self._get_current_object(), name)
AttributeError: '_AppCtxGlobals' object has no attribute 'e'