Importerror: No module named memcache (Django project)

Question

In a Django project of mine, I run this command to run the project on localhost:

python manage.py runserver

It results in the error:

Importerror: No module named memcache

However, I've already fulfilled the requirement via: sudo apt-get install python-memcache

Peculiarly, if I go into the python shell outside my virtualevn and try import memcache, it works fine. However, inside my virtualenv, if I go into the python shell and try import memcache, I get the same import error listed above. What's going on?

You might have two versions installed, and your app doesn't run with the default one. — Rafael Aguilar, Jan 10 '17 at 18:15
run `python --version` to check your default Python interpreter. Check the first line of your app main script (if you don't know where is it, just call `which ` — Rafael Aguilar, Jan 10 '17 at 18:22
You are using `virtualenv` to run this application?.. if so, just do `pip install memcache` from inside your venv and try to import/run it again. — Rafael Aguilar, Jan 10 '17 at 18:48
That worked. To be exact, I did `pip install python-memcached` (notice the d). If you write that as an answer, I'll accept it. — Hassan Baig, Jan 10 '17 at 18:50

Rafael Aguilar · Accepted Answer · 2020-03-03T15:16:53.747

64

As you are using virtualenv you'd need to install this dependency from inside as you might have created the virtual environment before installed it as a system-wide library.

After activate your virtualenv type:

pip install python-memcached

This should solve it.

edited Mar 03 '20 at 15:16

answered Jan 10 '17 at 18:52

Rafael Aguilar

3,084
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M3TALzero1 · Answer 2 · 2022-05-26T22:49:45.043

3

Based on pymemcache documentation

Since version 3.2, Django has included a pymemcache-based cache backend. See its documentation. On older Django versions, you can use django-pymemcache.

So for Django 3.2+ use :

pip install pymemcache

edited May 26 '22 at 22:49

answered Mar 13 '22 at 16:21

M3TALzero1

104
9

score 1 · Answer 3 · answered Dec 03 '18 at 10:43

1

First run

pip install django-pylibmc

set you cache backend:

CACHES = {
    'default': {
        'BACKEND': 'django.core.cache.backends.memcached.PyLibMCCache',
        'LOCATION': '127.0.0.1.11211',
    }
}

answered Dec 03 '18 at 10:43

Contropist

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Importerror: No module named memcache (Django project)

3 Answers3