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TemplateSyntaxError at 'bootstrap4' is not a registered tag library. Must be one of: bootstrap is installed and in INSTALED_APPS

I am trying to use bootstrap_datepicker_plus and to do that I need bootstrap4. I have installed it. when I run pipenv run pip freeze, I see:
django-bootstrap==0.2.4
django-bootstrap-datepicker-plus==3.0.5
django-bootstrap4==2.3.1
django-compressor==2.4
django-jquery==3.1.0
and I have in settings.py:
INSTALLED_APPS = [
"bootstrap4",
"bootstrap_datepicker_plus",
But I still see
TemplateSyntaxError at /myapp/
'bootstrap4' is not a registered tag library. Must be one of:
when I include {% load bootstrap4 %} in my template.
Does anyone have an idea of why the tag is not registered? I have restarted the server.

Django allows you to use different settings for different environments. My project was using this but left the settings.py file there which was not being used. There was a base.py file in the settings folder that I should have been editing.

integrate an external app in django taking the code from any folder

I want to install the external app django-disqus in my blog. However, instead of install the module in the system via pip install or python setup.py install, I would like to download the code to a specific folder called libs and then link it to my project.
My folder structure is like this:
-root_folder
-- project (here I have settings.py, urls.py and wsgi.py)
-- blog (here I have models.py, admin.py, urls.py, templatetags/, template/)
-- libs (here I want to add the code of disqus)
If I downloaded the code in libs, how can I link it to INSTALLED_APPS in setting.py?
Note: I run django 1.8

You should be able to register it the same way you'd register any django app.
Make libs a package by adding __init__.py file
Then add it to your settings.INSTALLED_APPS
INSTALLED_APPS = (
...
'libs.disqus',
)

how to import django project from github to local system?

I am new to Django.
I am trying to run a project, that downloaded from github .
I run the setup.py file . that downloaded all requirements .
after that i am stuck because there is no any manage.py file as i read in tutorial ( http://www.tangowithdjango.com/book17/chapters/setup.html) .

That is not a project. It's an app that you need to install in your own project.

you have to install it
pip install django-mongo-auth
docs are here
You should then add mongo_auth and dependency django_browserid to INSTALLED_APPS. Add django_browserid.context_processors.browserid_form to TEMPLATE_CONTEXT_PROCESSORS to conclude django_browserid installation. Add mongo_auth.middleware.LazyUserMiddleware just after django.contrib.auth.middleware.AuthenticationMiddleware in MIDDLEWARE_CLASSES.
Optionally, to use provided templates, you can add mongo_auth.contrib and sekizai to INSTALLED_APPS, and mongo_auth.contrib.context_processors.mongo_auth and sekizai.context_processors.sekizai to TEMPLATE_CONTEXT_PROCESSORS, too.
Afterwards, you configure authentication providers you want to offer:
AUTHENTICATION_BACKENDS = (
'mongo_auth.backends.MongoEngineBackend',
'mongo_auth.backends.FacebookBackend',
'mongo_auth.backends.TwitterBackend',
'mongo_auth.backends.FoursquareBackend',
'mongo_auth.backends.GoogleBackend',
'mongo_auth.backends.BrowserIDBackend',
'mongo_auth.backends.LazyUserBackend',
)
Hope it helps.

How to install a translation ".po" in django app?

I finished a few days ago, creating a translation file for Django-LFS (Lightning Fast Shop) for my native language (pt_BR). Now that it's done, I need to install the ".po" file that I downloaded after finishing my translation in Transifex.
Ok, I downloaded the file, but now that I need to install it, I just can't figure how. I tried putting the file in 'lfs-installer' folder, using "bin/django compilemessages -a", tried the same thing but with the file in many different folders, but I just can't make my LFS use my translation file...
Does anyone know how to make a translation package work on lfs? Or am I doing something wrong?
Thanks

put you .po file in the path:
<your_django_project>/conf/locale/pt_BR/LC_MESSAGES/
and run
django-admin makemessages -a

If you do not already have one, create a folder called Locale. Then in your settings.py folder you must tell it where to find the locale paths. Something like this:
LOCALE_PATHS{
C:/sdalfjasd/dfalsdjkf/locale
}
Also make sure you have locale middleware in your middleware...
You can probably effectively track down that syntax and specifics, now that I pointed you in the right direction.
Once you have those things set up, you can run your makemessage -a command, which will create a folder in your locale folder for the -a you put in. Then you can browse to this, inside it there should be a .po file (there might not be). If there is not, just put your .po file you made in there.
Then browse to your project in your CMD, and run compilemessages -a. This should compile your .po files into .mo files, the files necessary for translations to work.
Hopefully I did not go crazy off-track...

I made it to work using the following settings:
import os
DIRNAME = os.path.dirname(__file__)
USE_I18N = True
USE_L10N = True
LANGUAGE_CODE = 'pt-br'
LANGUAGES = (
('pt-br', u"Português"),
)
LOCALE_PATHS = [
DIRNAME + '/locale',
]
Than create a locale folder aside of the settings.py folder and follow Django official instructions. The desired path for your django.po file is: locale/pt_BR/LC_MESSAGES/django.po. After that, use compilemessages tool and restart the server.
It should work.
Tip: django-lfs uses locale module to handle currency display, but there is a bug for locale module that makes it to show 1234,00 R$ instead of R$ 1234,00. If it bites you, put the following into your settings.py:
# Fix for LC_MONETARY bug: http://www.sourceware.org/bugzilla/show_bug.cgi?id=1294
import locale
locale._override_localeconv.update({'p_cs_precedes': 1, 'n_cs_precedes': 1})
Good luck.

Django makemessages errors Unknown encoding "utf8"

I installed python separated from yum.
Now, I need to recompile the language pack for the OSQA system, but get this message:
Error: errors happened while running xgettext on __init__.py
xgettext: ./Django-1.2.3/tests/regressiontests/views/__init__.py:1: Unknown encoding "utf8". Proceeding with ASCII instead.
xgettext: Non-ASCII string at ./Django-1.2.3/tests/regressiontests/views/__init__.py:7.
Please specify the source encoding through --from-code or through a comment
as specified in http://www.python.org/peps/pep-0263.html.
I tried to set encode at utf-8 in the manage.py file but it didn't work.
Can someone help me to solve this issue?

I know this post is outdated but I had the same issue today, and it took me hours to find out why. Maybe people will be in the same case :
My virtualenv is in my django root directory :
Here is my project tree :
DjangoDirectory:
my_env
Django_App1
Django_App2
...
...
manage.py
When I launch command :
./manage.py makemessages -l fr
I get the same error :
Error: errors happened while running xgettext on __init__.py
...
In fact, I noticed that xgettext looked into ALL the files in my folder, as well as files in my_env.
So I found the -i flag which ignore files or folders during the makemessages process
So now, with the command below it works like a charm and I don't get the error anymore.
./manage.py makemessages -l fr -i my_env
Hope it will help

Actually yes, I've already had similar problems with makemessages, because on top of every source file I wrote "# coding: utf8". Even though it worked with source compilation, I've had to replace "utf8" with "utf-8" in every file.
If you're not used to makemessages, take care of gettext functions applied to format strings, you will need strings to contain named parameters when there is more than one placeholder.
"%s" is good
"%(max)s" is good too
"%(min)s %(max)s" too
"%s %s" is not ok.

Actually if you did all the configurations correctly in settings.py, views and templates and you installed gettext and all good, then you may want to check where your virtual environment is. For instance if it's inside your root folder in your project folder your structure I suppose is myapp_project/venv/
Also I'm assuming you've you created an empty folder called locale in your root myapp_project folder.
Try to run it like this if you're translating french for example:
and note: replace venv with whatever you named your virtual environment.
This is the short answer
django-admin.py makemessages -l fr -i venv
this above will get you the local/fr/LC_MESSAGES/django.po but you now have to run the second command to compile the .po file created by makemessages to a .mo file in the LC_MESSAGES folder
So, then run:
django-admin.py compilemessages
now this should get you the django.po file.
This is the long answer
If you configured your urls.py correctly with i18n_patterns, and you filled the translations of msgstr "" in your .po file and then run django-admin.py compilemessages again you can now run your server and go to your desired page 127.0.0.1:8000/fr/ and you should see your translations.
In case you are wondering what your settings.py file should look like (for french). It should look like this at least part of it.
from django.utils.translation import gettext_lazy as _
LANGUAGES = [
('fr', _('French')),
('en', _('English')),
]
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
LOCALE_PATHS = [
os.path.join(BASE_DIR, 'locale'),
]
Also in settings.py in the MIDDLEWARE list make sure you add the component. 'django.middleware.locale.LocaleMiddleware' and it's important where on the list you put that component as it executes from top to bottom. So put it under the sessions component.
For your main app (you may have a few or one) urls.py file make sure you import from django.conf.urls.i18n import i18n_patterns.
Next on the same urls.py file ensure that you actually add/or edit the url patterns alright. Here is an example of what it could look like:
urlpatterns += i18n_patterns (
path('', include('pages.urls')),
path('meals/', include('meals.urls')),
prefix_default_language=False
) + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
You can play with this and obviously on the paths above it don't include the admin. So just play around but just giving you an idea of what it should look like in order for /fr/ url to work.
You will also notice above the line prefix_default_language=False this is to prevent the /en/ default pattern. In this example we are translating from English to French. So no need to have /en/ in the pattern.
Don't forget in your templates... yes all of them, it don't matter if it's parent template or not. You have to include {% load i18n %} for this to work.
Important to Note:
When you go back to your templates files and you start updating your text content and adding your transblocks etc. After you do this. Go back to your terminal and stop your server, and again if you have your venv folder in your root you must run these commands:
django-admin.py makemessages -l fr -i venv
django-admin.py compilemessages
Now you can open your django.po file and add your translations to the edited text content in your templates. If your venv folder ins't in your root folder. You can just run django-admin.py makemessages -l fr instead.
If you don't do this, you will end up doing things manually in your .po file. You don't wanna do that.
I hope this helped.

I've created a ticket for this at http://code.djangoproject.com/ticket/15980.
It appears to be a simple typo in the Django code, the problem being that python treats "utf8" as an alias for "utf-8", but xgettext does not. The problem still exists as of Django r16169 (05/06/11 12:49:06) in SVN.
EDIT: The issue has been fixed now in the Django source (as of May 2011).

Recently, I had the same issue, and I couldn't find a fitting solution online. After a few tries, I resolved the error in my case. While creating the trans tags, make sure you do this for each paragraph excluding the paragraph breaks.
Instead of:
<p>
{% trans "
Paragraph I
Paragraph II
" %}
</p>
This may solve the error:
<p>
{% trans "Paragraph I" %}
</p>
<p>
{% trans "Paragraph II" %}
</p>