ModuleNotFoundError: No module named 'flask.ext'

[nuaays]

ERROR in Python3.6

from flask.ext.cache import make_template_fragment_key

  File "/usr/local/lib/python3.6/site-packages/flask_cache/__init__.py", line 156, in init_app
    from .jinja2ext import CacheExtension, JINJA_CACHE_ATTR_NAME
  File "/usr/local/lib/python3.6/site-packages/flask_cache/jinja2ext.py", line 33, in <module>
    from flask.ext.cache import make_template_fragment_key

Solution: change flask.ext.cache to flask_cache line33

line33: from flask_cache import make_template_fragment_key
#from flask.ext.cache import make_template_fragment_key

[winterjung]

Using from flask_cache import make_template_fragment_key instead. flask.ext.___ style is deprecated.

[jpds]

This is broken in here: https://github.com/thadeusb/flask-cache/blob/master/flask_cache/jinja2ext.py#L33

[jpds]

Relevant: #189, #187, #185, #184, #182, #169, #166.

[Benjacho]

Use flaskext.cache

[frispete]

Here's a q&d fix for the issue:

sed -i 's/flask.ext.cache/flask_cache/g' flask_cache/__init__.py flask_cache/jinja2ext.py test_cache.py docs/index.rst

[zoltan-fedor]

Use Flask-Caching instead https://github.com/sh4nks/flask-caching

[allanice001]

#192 has a pr for this

[worldwar2008]

cache.init_app(backend)

File "/Users/steven/.pyenv/versions/3.5.3/lib/python3.5/site-packages/flask_cache/init.py", line 156, in init_app
from .jinja2ext import CacheExtension, JINJA_CACHE_ATTR_NAME
File "/Users/steven/.pyenv/versions/3.5.3/lib/python3.5/site-packages/flask_cache/jinja2ext.py", line 33, in
from flask.ext.cache import make_template_fragment_key
ImportError: No module named 'flask.ext'

[sitthykun]

Use Flask-Caching instead https://github.com/sh4nks/flask-caching

Fix for pip3

[yangeren]

still not fixed!

[jac0x]

line33: from flask_cache import make_template_fragment_key

It works perfectly for me!
Python 3.6
Flask 1.0.2

Thank you.

[Lewiscowles1986]

@frispete suggestion worked for me mostly

sed -i 's/flask.ext.cache/flask_cache/g' flask_cache/__init__.py flask_cache/jinja2ext.py were the succeeding commands.