I installed Django on my Ubuntu 21.04 Software but when I use:
python manage.py runserver
I get an error massage :
No module named “Django”
But when I use :
python3 manage.py runserve
It works fine but my python —-version is 3.10.1 and python3 —version is 3.9.x
So what is the error and how I can run it with python only not python3
The issue here is that the python and python3 commands are pointing to two different Python installations/environments altogether.
It looks like you installed Django in your Python 3.9.x environment (the one which you access by typing python3).
On the other hand, your Python 3.10.1 environment (which you access by writing python) seems to have no Django installed.
The pip/pip3 commands are sometimes confusing, and may point to a different Python installation than the one you think they do. This depends entirely on how you set up your Python environments in your machine.
In order to access the pip of a specific Python environment, the best way is to run it as a module, e.g.:
python -m pip [...]
This guarantees that the pip you're using is the one associated with the Python environment you're evoking with the python command.
So in order to install Django on your Python 3.10.1 environment, you need to run:
python -m pip install django
If you use PIP3 to install the module, it will only be installed for Python3. If you use PIP to install the module, the system will use the Python version that is listed first in the PATH variable.
You have multiple Python instances on your machine. To avoid such a problems in the future, it is generally advised to use Virtualenv in Python, if you run code on your general-purpose device. (and have multiple Python instances on your machine)
In order to configure Virtualenv that run the following commands:
sudo apt install python3-venv python3-pip
python3 -m venv venv
Then you activate virtual environment:
source venv/bin/activate
Once the virtual environment is activated, you can install Python modules in this specific virtual environment, this way you will not have to mess up with issues such as the one you have described:
pip install django
and then if you run:
python manage.py runserver,
then it would be running in the context of the specific virtual environment.
I know it is not a direct answer to your problem, but I believe it will help you in avoiding such an issues in the future.
I'm following the Django tutorial https://docs.djangoproject.com/es/1.10/intro/tutorial01/
I've created a "mysite" dummy project (my very first one) and try to test it without altering it.
django-admin startproject mysite
cd mysite
python manage.py runserver
File "manage.py", line 14
) from exc
^
SyntaxError: invalid syntax
I'm getting a SyntaxError on a file that was generated by the system itself. And I seem unable to find anyone else who has gone through the same issue.
I'll add some data of my setup in case it may be of use
$ vpython --version
Python 2.7.12
$ pip --version
pip 9.0.1 from /home/frank/.local/lib/python2.7/site-packages (python 2.7)
$ python -m django --version
1.10.6
Adding contents of autogenerated manage.py
cat manage.py
#!/usr/bin/env python3
import os
import sys
if __name__ == "__main__":
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
try:
from django.core.management import execute_from_command_line
except ImportError as exc:
raise ImportError(
"Couldn't import Django. Are you sure it's installed and "
"available on your PYTHONPATH environment variable? Did you "
"forget to activate a virtual environment?"
) from exc
execute_from_command_line(sys.argv)
Make sure which python version you connect the django with (Make sure to activate the virtual env if you are using any).
When you install django using just
pip install django
then you have to run
python manage.py startapp <yourApp name>
else if you have used:
pip3 install django
then you have to run
python3 manage.py startapp <yourapp name>
Refer:
You can try with python3 manage.py runserver.
It works for me.
You should activate your virtual environment.
In terminal, source env/bin/activate. Depending on your shell, something like (env) should now be a part of the prompt.
And now runserver should work. No need to delete exc part!
Just activate your virtual environment.
For running Python version 3, you need to use python3 instead of python.
The final command will be:
python3 manage.py runserver
I was experiencing the same but this was solved by running with specific python 3.6 as below:
python3.6 manage.py runserver
Its a simple solution actually one i just ran into. Did you activate your virtual environment?
my terminal screenshot
It's best to create a virtual environment and run your Django code inside this virtual environment, this helps in not changing your existing environments. Here are the basic steps to start with the virtual environment and Django.
Create a new Directory and cd into it.
mkdir test , cd test
Install and Create a Virtual environment.
python3 -m pip install virtualenv virtualenv venv -p python3
Activate Virtual Environment: source venv/bin/activate
Install Django: pip install django
Start a new project: django-admin startproject myproject
cd to your project and Run Project:
cd myproject,
python manage.py runserver
You can see your project here: http://127.0.0.1:8000/
After testing with precise instructions (using python2 or python3 instead of just "python") I've constated that no matter what the tutorial says, this works ONLY with python3.
The solution is straightforward. the exception from manage.py
is because when running the command with python, Django is unable
to predict the exact python version,
say you may have 3.6, 3.5, 3.8 and maybe just one of this versions pip module was used to install Django
to resolve this either use:
./manage.py `enter code here`<command>
or using the exact python version(x.x) stands:
pythonx.x manage.py <command>
else the use of virtual environments can come in handy
because its relates any pip django module easily to python version
create env with pyenv or virtualenv
activate (e.g in virtualenv => virtualenv env)
run using python manage.py command
I solved same situation.
INSTALLED VERSION
python 3.6, django 2.1
SITUATION
I installed Node.js in Windows 10. After python manage.py runserver caused error.
ERROR
File "manage.py", line 14
) from exc
^
SyntaxError: invalid syntax
REASON
My python path changed to python-2.7 from python-3.6. (3.6 is correct in my PC.)
SOLUTION
Fix python path.
The following could be the possible reasons,
1. The virtual environment is not enabled
2. The virtual environment is enabled but the python version is different
To create virtual environment
$ virtualenv --python=python3 venv
To activate the virtual environment
$ source venv/bin/activate
You must activate virtual environment where you have installed django.
Then run this command
- python manage.py runserver
Also, the tutorial recommends that a virtual environment is used (see Django documentation: https://docs.djangoproject.com/en/2.0/topics/install/#installing-official-release"). You can do this with pipenv --three. Once you've installed django with pipenv install django and activated your virtual environment with pipenv shell, python will refer to python3 when executing python manage.py runserver.
Pipenv documentation:
https://pipenv.kennethreitz.org/
Activate your virtual environment then try collecting static files, that should work.
$ source venv/bin/activate
$ python manage.py collectstatic
You should start your Virtual Environment,
How to do it?
First with terminal cd into the directory containing manage.py
Then type $source <myvenv>/bin/activate
replace with you Virtual Environment name, without angular brackets.
Another issue can that your root directory and venv mis-match.
The structure should be something like this:
|-website
..facebook
..manage.py
..myvenv
..some other files
That is your virtual environment and manage.py should be in the same folder. Solution to that is to restart the project. If you are facing this error you must haven't coded anything yet, so restart.
I had the exact same error, but then I later found out that I forget to activate the conda environment which had django and other required packages installed.
Solution: Create a conda or virtual environment with django installed,
and activate it before you use the command:
$ python manage.py migrate
The django-admin maybe the wrong file.I met the same problem which I did not found on a different computer the same set-up flow.
After comparing two project, I found several difference at manage.py and settings.py, then I realized I created 2.0 django project but run it with python2.
runwhich django-adminin iterm
/Library/Frameworks/Python.framework/Versions/3.6/bin/django-admin
It looks like I got a django-admin in python3 which I didn't know why.So I tried to get the correct django-amin.
pip show django
then I got
Name: Django
Version: 1.11a1
Summary: A high-level Python Web framework that encourages rapid development and clean, pragmatic design.
Home-page: https://www.djangoproject.com/
Author: Django Software Foundation
Author-email: foundation#djangoproject.com
License: BSD
Location: /Library/Python/2.7/site-packages
Requires: pytz
In/Library/Python/2.7/site-packages, I found the django-admin
/Library/Python/2.7/site-packages/django/bin/django-admin.py
So I created project again by
/Library/Python/2.7/site-packages/django/bin/django-admin.py startproject myproject
then run
cd myproject
python manage.py runserver
succeeded🎉
We have to create a virtual environment inside the project, not outside the project..
Then it will solve..
I landed on the same exact exception because I forgot to activate the virtual environment.
I was also getting the same error.
Then I went back to the folder where the environment folder is there and I forgot to activate a Virtual environment so only I was getting this error.
Go to that folder and activate the virtual environment.
$ source env/bin/activate
I had this issue (Mac) and followed the instructions on the below page to install and activate the virtual environment
https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/
$ cd [ top-level-django-project-dir ]
$ python3 -m pip install --user virtualenv
$ python3 -m venv env
$ source env/bin/activate
Once I had installed and activated the virtual env I checked it
$ which python
Then I installed django into the virtual env
$ pip install django
And then I could run my app
$ python3 manage.py runserver
When I got to the next part of the tutorial
$ python manage.py startapp polls
I encountered another error:
File "manage.py", line 16
) from exc
^
SyntaxError: invalid syntax
I removed
from exc
and it then created the polls directory
Same issue occurred to me,But what I did was,
Just Replaced:
python manage.py runserver
with
python3 manage.py runserver
in the terminal(macOsX). Because I am using Python version 3.x
I encountered the same error when using pipenv. The issue was caused by not accessing Django correctly from within the virtual environment.
The correct steps using pipenv:
Activate virtual environment: pipenv shell
Install Django: pipenv install django
Create a project: django-admin startproject myproject
Navigate into project folder: cd myproject
Start Django with pipenv: pipenv run python manage.py runserver
Note: Pipenv will use the correct python version and pip within the virtual environment.
It seems you have more than one version of Python on your computer.
Try and remove one and leave the only version you used to develop your application.
If need be, you can upgrade your version, but ensure you have only one version of Python on your computer.
What am I wondering is though the django is installed to the container it may not be in the host machine where you are running the command. Then how will the command run. So since no above solutions worked for me.
I found out the running container and get into the running container using docker exec -it <container> bash then ran the command inside docker container. As we have the volumed container the changes done will also reflect locally. What ever command is to be run can be run inside the running container
For future readers,
I too had the same issue. Turns out installing Python directly from website as well as having another version from Anaconda caused this issue. I had to uninstall Python2.7 and only keep anaconda as the sole distribution.
Have you entered the virtual environment for django? Run python -m venv myvenv if you have not yet installed.
I had same problem and could solve it. It is related to the version of Django you've installed, some of them are not supported by python 2.7. If you have installed Django with pip, it means that you are installing the latest version of that which probably is not supported in python 2.7, You can get more information about it here. I would suggest to python 3 or specify the version of Django during installing (which is 1.11 for python 2.7).
I solved this problem to uninstall the multiple version of Python.
Check Django Official Documentation for Python compatibility.
"Python compatibility
Django 2.1 supports Python 3.5, 3.6, and 3.7. Django 2.0 is the last version to support Python 3.4."
manage.py file
#!/usr/bin/env python
import os
import sys
if __name__ == '__main__':
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'work.settings')
try:
from django.core.management import execute_from_command_line
except ImportError as exc:
raise ImportError(
"Couldn't import Django. Are you sure it's installed and "
"available on your PYTHONPATH environment variable? Did you "
"forget to activate a virtual environment?"
) from exc
execute_from_command_line(sys.argv)
If removing "from exc" from second last line of this code will generate another error due to multiple versions of Python.
when running django-admin startproject myproject on macOS I get the error
Traceback (most recent call last):
File "/usr/local/bin/django-admin", line 2, in
from django.core import management
ImportError: No module named django.core
I checked out this question but running import django won't produce any output in a python3 shell.
/usr/local/bin/django-admin is a symlink to /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/bin/django-admin.py.
I already put /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django in my PYTHONPATH as suggested in other questions.
Am I missing something?
Even if you make it work, it is not good practice to do what you're doing! Ideally, the only python-related binaries you would want in /usr/local/bin/ would be python, pip and virtualenv (or venv, pyvenv)...
I would suggest you to delete /Library/Frameworks/Python.framework/Versions/3.6 ONLY IF you installed it there. As far as I know, macOS only comes with python2.7 installed and not python3.6!
Then open a new shell and try this:
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew install python3
pip3 install virtualenv
cd ~/Desktop/
mkdir proj
cd proj
virtualenv -p python3 env
source env/bin/activate
pip install django
django-admin.py startproject testproj
skip the first step if you already have brew installed
Check your permissions in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ with an ls -la command. If you see anything owned by root, this probably needs to change. I suspect that since you installed some packages as root, the permissions are weird and it can't find the module. If this is the case, reinstall the package(s) as your own user using sudo.
Another thing you should check: as phd mentioned you need to make sure you're using the version of python you think you are. Check this by running which python to tell you the location of the one you're referencing, and python --version to tell you which version you're using. If it's not Python 3.6, then you installed Django for a different version of Python. In this case, simply install Django for version 3.6 and you'll be on your way.
For future reference, Python offers a module called venv to prevent version mishaps like this. More info can be found here.
It seems like you are trying to create or work on a django project without using a python virtual environment. I recommend reviewing the python 3 venv documenation (https://docs.python.org/3/library/venv.html). Then creating a virtual environment (venv) specifically for your web application. Once you you that project's venv setup you can install django into that venv.
On MacOS, use sudo before the command:
sudo django-admin startproject myproject
I cloned my Django Project from Github Account and activated the virtualenv using famous command source nameofenv/bin/activate
And when I run python manage.py runserver
It gives me an error saying:
ImportError: Couldn't import Django. Are you sure it's installed and available on your PYTHONPATH environment variable? Did you forget to activate a virtual environment?
I was thinking that every and each dependency I need, might be present inside virtualenv.
Well, no. By default, a newly created virtualenv comes empty, that is, with no third-party library. (Optionaly, you may allow a virtualenv to access libraries installed system-wide, but that's another story.)
Once the virtualenv is created, you need to install the dependencies you need.
(How could virtualenv know what dependencies you need?)
The procedure is to install the virtualenv, activate it, and then install the libraries needed for the project (in you case Django and perhaps others).
If you project has a requirements.txt, you may install every required dependency with the command:
pip install -r requirements.txt
If your project has a setup.py, you may also execute
pip install -e path/to/your/project/clone/.
to install the project in the virtualenv. This should install the dependencies.
Of course, if the only dependency is Django, you can just type
pip install django
on ubuntu version
#install python pip
sudo apt-get install python-pip
#install python virtualenv
sudo apt-get install python-virtualenv
# create virtual env
virtualenv myenv
#activate the virtualenv
. myenv/bin/activate
#install django inside virtualenv
pip install django
#create a new django project
django-admin.py startproject mysite
#enter to the folder of the new django project
cd mysite
#run the django project
python manage.py runserver
If you have several python on your machine, for example,python2.7, python3.4, python3.6, it is import to figure out which version the python really reference to, and more over, which version does pip reference to.
The same problem got in my way after I installed the let's encrypt when I run the following command.
(python3 manage.py runserver 0:8000 &)
I inspected the python version and found that python3, python3.4, python3.6, python3.4m were all available.
I just change python3 to python3.6 and solved the problem.
(python3.6 manage.py runserver 0:8000 &)
So, this is probably a version mismatching problem if it is OK for a long time and crashes down suddenly.
I'm guessing you also upload the virtual environment from your other pc. And you hope that only activating that will work, bzz.
It's not recommended to upload the virtualenv files to your git repository, as #Alain says it's a good practice to have a requirements.txt file containing the project dependencies. You can use pip freeze > requirements.txt (when the environment is activated) to generate the project requirements file.
By doing so, when you clone the repository from another computer, you need to create a new virtualenv by issuing the command:
virtualenv nameofenv
then activate it:
source nameofenv/bin/activate
and finally, use the requirements file to install the requirements for your project using:
pip install -r requirements.txt
I had installed Django 2 via pip3 install Django, but I was running python manage.py runserver instead of python3 manage.py runserver. Django 2 only works with python 3+.
I can't for the life of me figure out what I'm doing wrong, here's what's going on:
I'm running google appengine with django on my local dev
this is happening from within a virtualenv running python2.5
I have installed the mimeparse package using pip install -E for that virtualenv
I have verified this by checking the site packages in my 'something-env/lib/python2.5/site-packages' for the mimeparse.py
running the python shell lets me import mimeparse
running python manage.py shell also lets me import mimeparse
running python manage.py runserver will fail on import mimeparse, but in the pretty django error page I can see that the python path contains the something-env/lib/python2.5/site-packages folder
what can I be doing wrong?
NOTE: copying the mimeparse.py into the project root will work, but that is not exactly pretty.
If you get stuck running Ubuntu, with the following import error: no module named mimeparse, just install it, by adding the following line on your terminal in the appropriate directory :
pip install mimeparse
There is a debian package:
sudo apt-get install python-mimeparse
But, I didn't need to install the debian package. Just the first command and works for me.
Don't forget to activate your env.
source $PYTHON_HOME/activate
My $PYTHON_HOME points to my virtualenv python.