Develop Reference

I am trying to connect my Django app with Mysql database but when I tried to migrate loads of error started to pop up in the terminal.

I tried various ways (every solution mentioned in the stackoverflow) to solve the problem but still the problems continues.
When I run : "python manage.py migrate" the following error is shown
Traceback (most recent call last):
File "manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "/Manish/Projects/Websites/SanirTVNetwork/SanirTV/lib/python2.7/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
utility.execute()
File "/Manish/Projects/Websites/SanirTVNetwork/SanirTV/lib/python2.7/site-packages/django/core/management/__init__.py", line 359, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Manish/Projects/Websites/SanirTVNetwork/SanirTV/lib/python2.7/site-packages/django/core/management/base.py", line 305, in run_from_argv
self.execute(*args, **cmd_options)
File "/Manish/Projects/Websites/SanirTVNetwork/SanirTV/lib/python2.7/site-packages/django/core/management/base.py", line 353, in execute
self.check()
File "/Manish/Projects/Websites/SanirTVNetwork/SanirTV/lib/python2.7/site-packages/django/core/management/base.py", line 385, in check
include_deployment_checks=include_deployment_checks,
File "/Manish/Projects/Websites/SanirTVNetwork/SanirTV/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 61, in _run_checks
issues = run_checks(tags=[Tags.database])
File "/Manish/Projects/Websites/SanirTVNetwork/SanirTV/lib/python2.7/site-packages/django/core/checks/registry.py", line 81, in run_checks
new_errors = check(app_configs=app_configs)
File "/Manish/Projects/Websites/SanirTVNetwork/SanirTV/lib/python2.7/site-packages/django/core/checks/database.py", line 9, in check_database_backends
for conn in connections.all():
File "/Manish/Projects/Websites/SanirTVNetwork/SanirTV/lib/python2.7/site-packages/django/db/utils.py", line 226, in all
return [self[alias] for alias in self]
File "/Manish/Projects/Websites/SanirTVNetwork/SanirTV/lib/python2.7/site-packages/django/db/utils.py", line 211, in __getitem__
backend = load_backend(db['ENGINE'])
File "/Manish/Projects/Websites/SanirTVNetwork/SanirTV/lib/python2.7/site-packages/django/db/utils.py", line 115, in load_backend
return import_module('%s.base' % backend_name)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/Manish/Projects/Websites/SanirTVNetwork/SanirTV/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 28, in <module>
raise ImproperlyConfigured("Error loading MySQLdb module: %s" % e)
django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: No module named MySQLdb
Then I tried: "pip install mysql-python" as per the suggestions in the stackoverflow similar questions. I got the following error
Collecting mysql-python
Using cached MySQL-python-1.2.5.zip
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/private/var/folders/7_/cx21vvvn5cqdypfndc7j_jl80000gn/T/pip-build-JjMQeR/mysql-python/setup.py", line 17, in <module>
metadata, options = get_config()
File "setup_posix.py", line 53, in get_config
libraries = [ dequote(i[2:]) for i in libs if i.startswith(compiler_flag("l")) ]
File "setup_posix.py", line 8, in dequote
if s[0] in "\"'" and s[0] == s[-1]:
IndexError: string index out of range
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/7_/cx21vvvn5cqdypfndc7j_jl80000gn/T/pip-build-JjMQeR/mysql-python/
I even tried: "brew install mysql-connector-c" but the same error starts to come.

I finally did it:
First I installed the command line developer tools required by running the following code inside the virtualenv
$ xcode-select --install
Then I installed MySQL-python by using the following code
pip install MySQL-python
Finally I migrated the database using:
python manage.py migrate
It worked without any errors
The main problem with the error was that I didn't installed the command line developer tools required.

Error loading Mysqldb module in Python Django

I am currently working on Ubuntu 14.10/Python/Django/MySQL and encountering the following error when I try to run:
$python manage.py makemigrations polls
or
$python manage.py migrate polls
I have also tried syncdb
The error is:
(Aaronpythonenv)aaron#aaron-N550JK:~/mysite$ python manage.py makemigrations polls
Traceback (most recent call last):
File "manage.py", line 10, in
execute_from_command_line(sys.argv)
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/core/management/init.py", line 338, in execute_from_command_line
utility.execute()
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/core/management/init.py", line 312, in execute
django.setup()
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/init.py", line 18, in setup
apps.populate(settings.INSTALLED_APPS)
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/apps/registry.py", line 108, in populate
app_config.import_models(all_models)
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/apps/config.py", line 198, in import_models
self.models_module = import_module(models_module_name)
File "/usr/lib/python2.7/importlib/init.py", line 37, in import_module
import(name)
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/contrib/auth/models.py", line 41, in
class Permission(models.Model):
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/db/models/base.py", line 139, in new
new_class.add_to_class('_meta', Options(meta, **kwargs))
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/db/models/base.py", line 324, in add_to_class
value.contribute_to_class(cls, name)
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/db/models/options.py", line 250, in contribute_to_class
self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/db/init.py", line 36, in getattr
return getattr(connections[DEFAULT_DB_ALIAS], item)
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/db/utils.py", line 240, in getitem
backend = load_backend(db['ENGINE'])
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/db/utils.py", line 111, in load_backend
return import_module('%s.base' % backend_name)
File "/usr/lib/python2.7/importlib/init.py", line 37, in import_module
import(name)
File "/home/aaron/Aaronpythonenv/local/lib/python2.7/site-packages/Django-1.8-py2.7.egg/django/db/backends/mysql/base.py", line 27, in
raise ImproperlyConfigured("Error loading MySQLdb module: %s" % e)
django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: No module named MySQLdb
I have used PIP to install mysql-python to my environment which I recieved another error. I then used sudo apt-get command to install correct the error PIP brought up.
massive thank you in advance please let me know if I need to add anything else.

I faced somewhat similar problem. Try these steps:
1). Upgrade pip to the latest version.
sudo pip install pip --upgrade
2). Build the dependencies for python-mysqldb libraries:
sudo apt-get build-dep python-mysqldb
3). Install the Python MySQL libraries:
sudo pip install MySQL-python

I think it means there is no module named mysqldb.
You just need to setup the mysqldb module.
For example if you use the ubuntu, you just need to run this command:
sudo apt-get install python-mysqldb
and then you problem will be fixed!

Installing psycopg2 in a virtualenv in ubuntu os

I using a virtualenv and I am trying to set up postgresql. I have psycopg2 installed on my system, but it appears that my virtual env does not recognize psycopg2. Is it possible to just copy the system wide psycopg2 files into my django project directory or is this a bad approach to take?
This is the relevant part of my settings.py file in my django project.
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'django_db' ,
'USER': 'myusername' ,
'PASSWORD': 'mypassword' ,
'HOST': 'localhost' ,
'PORT': '' ,
}
}
When I run python manage.py migrate I get this error:
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
utility.execute()
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 354, in execute
django.setup()
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/__init__.py", line 21, in setup
apps.populate(settings.INSTALLED_APPS)
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/apps/registry.py", line 108, in populate
app_config.import_models(all_models)
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/apps/config.py", line 197, in import_models
self.models_module = import_module(models_module_name)
File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/contrib/auth/models.py", line 40, in <module>
class Permission(models.Model):
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/db/models/base.py", line 125, in __new__
new_class.add_to_class('_meta', Options(meta, **kwargs))
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/db/models/base.py", line 300, in add_to_class
value.contribute_to_class(cls, name)
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/db/models/options.py", line 166, in contribute_to_class
self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/db/__init__.py", line 40, in __getattr__
return getattr(connections[DEFAULT_DB_ALIAS], item)
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/db/utils.py", line 242, in __getitem__
backend = load_backend(db['ENGINE'])
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/db/utils.py", line 108, in load_backend
return import_module('%s.base' % backend_name)
File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 27, in <module>
raise ImproperlyConfigured("Error loading psycopg2 module: %s" % e)
django.core.exceptions.ImproperlyConfigured: Error loading psycopg2 module: No module named psycopg2
When I do pip install psycopg2 in my virtual env, I get the following error:
Exception:
Traceback (most recent call last):
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/pip/basecommand.py", line 122, in main
status = self.run(options, args)
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/pip/commands/install.py", line 278, in run
requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/pip/req.py", line 1153, in prepare_files
location = req_to_install.build_location(self.build_dir, not self.is_download)
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/pip/req.py", line 218, in build_location
_make_build_dir(build_dir)
File "/uwsgi-tutorial/local/lib/python2.7/site-packages/pip/req.py", line 1527, in _make_build_dir
os.makedirs(build_dir)
File "/uwsgi-tutorial/lib/python2.7/os.py", line 157, in makedirs
mkdir(name, mode)
OSError: [Errno 13] Permission denied: '/uwsgi-tutorial/build'
Storing debug log for failure in /home/user/.pip/pip.log

This is an old thread but some people might experience Python.h not found type of error while pip-installing psycopg2 to virtualenv on Ubuntu based systems.
Check your virtualenv python version by running python -V inside virtualenv.
Assuming it is Python 3.8.0, try installing libpython3.8-dev to your system (not virtualenv) by:
sudo apt-get install libpython3.8-dev
Probably similar approach with other versions.
That solved it for me.

Based on the combination of your question and one of your comments, it appears that when you ran sudo pip install psycopg2, it was using the system install, as it referred to psycopg2 in /usr/lib/python2.7/dist-packages which is different from the environment from which you're trying to run Django.
Your permissions error, which is from the Django environment, seems likely to be due to not using sudo (among other things, some C compilation needs to take place, during the psycopg2 install, and so sudo is often required whereas it isn't with many other packages).
I would recommend you refer to the virtualenv install's pip binary explicitly when running the sudo command.
i.e.: sudo <virtualenv_root>/bin/pip install psycopg2

Something that worked for me (python 3.8 in virtualenv):
Inside the virtual environment type:
pip install psycopg2-binary
Best.

Django, cannot make messages

I'm writing this post because after hours of research around, no real solution was found about my issue.
I've a Django project that used to run on another computer. Now, I've a new one, I've reinstalled Django and VirtualEnvWrapper.
I've cloned my project from my git and I can work and deploy without any issues.
Running ./manage.py works when I'm on the correct virtualenv (via workon 'my_project_name').
My problem is that I can't generate translations any more.
Here is the trace-back:
(MyProject)--- python/MyProject ‹master*➔ M› »django-admin.py makemessages --all
Traceback (most recent call last):
File "/usr/local/bin/django-admin.py", line 5, in <module>
management.execute_from_command_line()
File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
utility.execute()
File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 376, in execute
sys.stdout.write(self.main_help_text() + '\n')
File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 240, in main_help_text
for name, app in six.iteritems(get_commands()):
File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 107, in get_commands
apps = settings.INSTALLED_APPS
File "/Library/Python/2.7/site-packages/django/conf/__init__.py", line 54, in __getattr__
self._setup(name)
File "/Library/Python/2.7/site-packages/django/conf/__init__.py", line 49, in _setup
self._wrapped = Settings(settings_module)
File "/Library/Python/2.7/site-packages/django/conf/__init__.py", line 132, in __init__
% (self.SETTINGS_MODULE, e)
ImportError: Could not import settings 'MyProject.settings.local' (Is it on sys.path? Is there an import error in the settings file?): No module named MyProject.settings.local
When I'm checking my sys.path, here is the content:
/Users/jbcollet/.virtualenvs/MyProject/lib/python27.zip
/Users/jbcollet/.virtualenvs/MyProject/lib/python2.7
/Users/jbcollet/.virtualenvs/MyProject/lib/python2.7/plat-darwin
/Users/jbcollet/.virtualenvs/MyProject/lib/python2.7/plat-mac
/Users/jbcollet/.virtualenvs/MyProject/lib/python2.7/plat-mac/lib-scriptpackages
/Users/jbcollet/.virtualenvs/MyProject/Extras/lib/python
/Users/jbcollet/.virtualenvs/MyProject/lib/python2.7/lib-tk
/Users/jbcollet/.virtualenvs/MyProject/lib/python2.7/lib-old
/Users/jbcollet/.virtualenvs/MyProject/lib/python2.7/lib-dynload
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages
/Users/jbcollet/.virtualenvs/MyProject/lib/python2.7/site-packages
Can someone help me with this?
Thanks a lot

Django 1.4.1 error loading MySQLdb module when attempting 'python manage.py shell'

I am trying to set up MySQL, and can't seem to be able to enter the Django manage.py shell interpreter. I did install MySQL-python but that did not solve the issue.
Getting the output below:
rrdhcp-10-32-44-126:django pavelfage$ python manage.py shell
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
utility.execute()
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/__init__.py", line 382, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/base.py", line 196, in run_from_argv
self.execute(*args, **options.__dict__)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/base.py", line 232, in execute
output = self.handle(*args, **options)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/base.py", line 371, in handle
return self.handle_noargs(**options)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/commands/shell.py", line 45, in handle_noargs
from django.db.models.loading import get_models
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/__init__.py", line 40, in <module>
backend = load_backend(connection.settings_dict['ENGINE'])
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/__init__.py", line 34, in __getattr__
return getattr(connections[DEFAULT_DB_ALIAS], item)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/utils.py", line 92, in __getitem__
backend = load_backend(db['ENGINE'])
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/utils.py", line 24, in load_backend
return import_module('.base', backend_name)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
__import__(name)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 16, in <module>
raise ImproperlyConfigured("Error loading MySQLdb module: %s" % e)
django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: No module named _mysql
Any suggestions really appreciated.

You are probably missing the MySQLdb module. You basically just have to install it.
By the looks of it, you are using a Mac, so you might want to check out this answer for detailed installation instructions: How to install MySQLdb (Python data access library to MySQL) on Mac OS X?
On a totally alternate solution, as you mentionned Django development you might want to use sqlite3 instead of MySQL, which could be simpler to install.

You should be able to import MySQLdb from python shell.
Try importing MySQLdb from python shell not django
If you can not import MySQLdb from python shell;
It may caused because of 32-64 bit mismatch,
Try this link