Django framework startapp [duplicate] - python

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.

Related

Django-admin isn't detected - windows

No matter what I try, I CANNOT use django admin to start a python project. Django is installed, in site-packages. I can call it from the python shell. Python is configured and is in my PATH. I've tried with venv and without. I'm out of solutions. Any ideas?
(I'm using the python 3.7 installation from the windows store)
You can try this approach,
first open that project folder or directory by terminal (do not launch virtual enviroment at here), then apply following commands;
pipenv shell
pipenv install django==3.0
python manage.py runserver
Note: if pipenv is not installed than run this command first;
pip install pipenv (not in virtual environment)
then follow the above commands.

How to start a new project in django using virtualenv

I just installed virtualenv and in it I installed django. However, when I go to the django-admin terminal in the bin file, I wrote
django-admin startproject mysite
I thought that would start a new project but it just returned
Note that only Django core commands are listed as settings are not properly configured (error: Requested setting INSTALLED_APPS, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.).
Here is how to start a new django project in a virtualenv:
1. Create a new virtualenv for your project:
virtualenv py_env --python=python3
--python=python3 is not mandatory. I'd recommend programming in python3.x but this is up to you. If you are unsure about what is the default python that will be used when omitting the --python option, type python -V in your terminal.
2. Activate the virtualenv:
source py_env/bin/activate
If you see a (py_env) at the beginning of the command line, then you know the virtualenv is activated. To deactivate, simply type deactivate.
3. Install the required packages:
pip install django
While this is not needed, I recommend using ipython, so you might want to run pip install ipython.
4. Create a new django project:
django-admin startproject mysite
Hope that helped and happy coding!
I think you should first make a virtual environment:
pip3 install --user pipenv
Make a virtual environment:
pipenv --python 3.6
Activate the environment:
pipenv shell
and after this do whatever you want i think it would work better now
Pipenv is best to use because it brings the best Packages of python so that there may not be further bugs while making the virtual environment. And django can be replicated properly.

ImportError when using virtualenv in Django

My Question is pretty Simple.
Whenever I use virtualenv environment in my Django project it gives the following error when executed this command
python manage.py runserver
File "manage.py", line 8, in
from django.core.management import execute_from_command_line
ImportError: No module named django.core.management
But when i use root and give the same command it seems to work perfectly. Why does this Happen? I am in the virtualenv so it means i am the root person by default.How can i fix this error?
I had seen many forums but couldn't find related to mine.
This happens because you have installed django in the system-wide Python interpreter; possibly by doing something like sudo pip install django.
Once you create a virtual environment and activate it - it contains no packages. The concept of a virtual environment is that it allows you to install Python packages without affecting the global Python installation.
So once you activate a virtual environment, you have to install packages in that virtual environment; so you should pip install django (note: without sudo) once you activate the virtual environment; like this:
$ virtualenv sample_env
...
$ source sample_env/bin/activate
(sample_env) $ pip install django
A virtual environment is a virtual environment for Python; it does not control what the user is that is logged into the system.
Finally, as a general rule - you should not be using root for development purposes as doing so can easily compromise your system.
Yup i have same error while running Django. I also have enabled virtual environment. But I was still getting error.
Solution to this problem is using this command to install any python package
python -m pip install django
This will definitely solve your problem. As it solved mine.

Django-admin creates wrong django version inside virtualenv

I've created a n new directory, a virtualenv and installed a django-toolbelt inside it. The django-version should be 1.8 but when I call 'django-admin.py version' it says 1.6. So when I start a new project it creates a 1.6. I thought virtualenv was supposed to prevent this. What am I doing wrong?
Edit: I think it has to do with the PATH (?). Like it's calling the wrong django-admin version. I'm on Windows 7. Still don't know how to fix it.
I came across this problem too. In the official document, I found that, in a virtual environment, if you use the command 'django-admin', it would search from PATH usually in '/usr/local/bin'(Linux) to find 'django-admin.py' which is a symlink to another version of django. This is the reason of what happened finally.
So there are two methods to solve this problem:
re-symlink your current version django-admin(site-packages/django/bin/django-admin.py) to 'usr/local/bin/django-admin' or 'usr/local/bin/django-admin.py'
REMIND: This is a kind of global way so that it will effects your other django projects, so I recommend the second method
cd to your_virtual_env/lib/python3.x/site-packages/django/bin/(of course you should activate your virtual environment), and then use 'python django-admin.py startproject project_name project_full_path' to create django project
Try and install Django into the virtual environment as well:
pip install django
It should install the latest version, you can also specify a particular version (let's say 1.8.2) if you need to:
pip install django==1.8.2
Either way you'll have the correct version of Django in your virtual environment and it should work as you expect then.
You can also use the following command to see what version you have installed:
pip show django
Update:
It seems that you have the correct version installed in your virtual environment, but for some reason your Windows 7 use the system Django installation instead while you use manage.py or django-admin.py directly. However, you can use python manage.py or python django-admin.py instead, which seems to work as expected (and use the virtualenv Django installation).
I had the same problem. Could be related to your zsh/bash settings.
I realized that using zsh (my default) I would get django-admin version 1.11 despite the Django version was 2.1! When I tried the same thing with bash I would get django-admin version 2.1 (the correct version). Certainly a misconfiguration.
So, I strongly suggest you check your zsh or bash settings to check for paths you might have.
Create a virtual environment for a project:
$ mkdir cd my_project_folder
$ cd my_project_folder
$ virtualenv venv
$ source venv/bin/activate
And now install django
(venv) ~$ pip install django==1.8
manage.py runserver in virtualenv using wrong django version
pip / virtualenv / django installation issue

Django - "no module named django.core.management"

I get the following error when trying to run Django from the command line.
File manage.py, line 8, in <module>
     from django.core.management import execute_from_command_line
ImportError: No module named django.core.management
Any ideas on how to solve this?
It sounds like you do not have django installed. You should check the directory produced by this command:
python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()"
To see if you have the django packages in there.
If there's no django folder inside of site-packages, then you do not have django installed (at least for that version of python).
It is possible you have more than one version of python installed and django is inside of another version. You can find out all the versions of python if you type python and then press TAB. Here are all the different python's I have.
$python
python python2-config python2.6 python2.7-config pythonw2.5
python-config python2.5 python2.6-config pythonw pythonw2.6
python2 python2.5-config python2.7 pythonw2 pythonw2.7
You can do the above command for each version of python and look inside the site-packages directory of each to see if any of them have django installed. For example:
python2.5 -c "from distutils.sysconfig import get_python_lib; print get_python_lib()"
python2.6 -c "from distutils.sysconfig import get_python_lib; print get_python_lib()"
If you happen to find django inside of say python2.6, try your original command with
python2.6 manage.py ...
sudo pip install django --upgrade
did the trick for me.
I got the same error and I fixed it in this manner:
I had to activate my virtual environment using the following command
source python2.7/bin/activate
Most probably in your manage.py the first line starts with !/usr/bin/python which means you are using the system global python rather than the one in your virtual environment.
so replace
/usr/bin/python
with
~/projectpath/venv/bin/python
and you should be good.
well, I faced the same error today after installing virtualenv and django. For me it was that I had used sudo (sudo pip install django) for installing django, and I was trying to run the manage.py runserver without sudo. I just added sudo and it worked. :)
Are you using a Virtual Environment with Virtual Wrapper? Are you on a Mac?
If so try this:
Enter the following into your command line to start up the virtual environment and then work on it
1.)
source virtualenvwrapper.sh
or
source /usr/local/bin/virtualenvwrapper.sh
2.)
workon [environment name]
Note (from a newbie) - do not put brackets around your environment name
I am having the same problem while running the command-
python manage.py startapp < app_name >
but problem with me is that i was running that command out of virtual environment.So just activate your virtual environment first and run the command again -
I experience the same thing and this is what I do.
First my installation of
pip install -r requirements.txt
is not on my active environment. So I did is activate my environment then run again the
pip install -r requirements.txt
The problem occurs when django isn't installed on your computer. You also get this error because the django.core.management module is missing.
To solve this issue we have to install django using pip. Open a command line prompt -> cmd(on windows) and enter the following command:
pip install django
This command will install django on your computer. So consider installing pip first. Here's how to install pip on a Windows machine
Okay so it goes like this:
You have created a virtual environment and django module belongs to that environment only.Since virtualenv isolates itself from everything else,hence you are seeing this.
go through this for further assistance:
http://www.swegler.com/becky/blog/2011/08/27/python-django-mysql-on-windows-7-part-i-getting-started/
1.You can switch to the directory where your virtual environment is stored and then run the django module.
2.Alternatively you can install django globally to your python->site-packages by either running pip or easy_install
Command using pip: pip install django
then do this:
import django print (django.get_version()) (depending on which version of python you use.This for python 3+ series)
and then you can run this: python manage.py runserver and check on your web browser by typing :localhost:8000 and you should see django powered page.
Hope this helps.
In case this is helpful to others... I had this issue because my virtualenv defaulted to python2.7 and I was calling Django using Python3 while using Ubuntu.
to check which python my virtualenv was using:
$ which python3
>> /usr/bin/python3
created new virtualenv with python3 specified (using virtualenv wrapper https://virtualenvwrapper.readthedocs.org/en/latest/):
$ mkvirtualenv --python=/usr/bin/python3 ENV_NAME
the python path should now point to the virtualenv python:
$ which python3
>> /home/user/.virtualenvs/ENV_NAME/bin/python3
This also happens if you change the directory structure of your python project (I did this, and then puzzled over the change in behavior). If you do so, you'll need to change a line in your /bin/activate file. So, say your project was at
/User/me/CodeProjects/coolApp/
and your activate file is at
/User/me/CodeProjects/coolApp/venv/bin/activate
when you set up your project, then you changed your project to
/User/me/CodeProjects/v1-coolApp/
or something. You would then need to open
/User/me/CodeProjects/v1-coolApp/venv/bin/activate
find the line where it says
VIRTUAL_ENV="/User/me/CodeProjects/coolApp"
export VIRTUAL_ENV
and change it to
VIRTUAL_ENV="/User/me/CodeProjects/v1-coolApp"
before reactivating
In my case, I am using Ubuntu. The problem can be that I don't have the permission to write to that folder as a normal user. You can simply add the sudo before your command and it should work perfectly. In my case sudo python manage.py syncdb.
I had the same issue and the reason I was getting this message was because I was doing "manage.py runserver" whereas doing "python manage.py runserver" fixed it.
I had the same problem and following worked good, you should navigate main folder in your project than type:
source bin/activate
My case I used pyCharm 5 on mac. I also had this problem and after running this command my problem was solved
sudo pip install django --upgrade
had the same problem.run command 'python manage.py migrate' as root. works fine with root access (sudo python manage.py migrate )
You can try it like so : python3 manage.py migrate (make sur to be in the src/ directory)
You can also try with pip install -r requirements.txt (make sur you see the requirements.txt file when you type ls after the migrate
If after all it still won't work try pip install django
Hope it helps
I got the same problem trying to use the python manage.py runserver. In my case I just use sudo su. Use the terminal as a root and try it again an it works partially. So I use python manage.py migrate comand and it fix it.
You must choose your Project first before running the server , type this
workon your_project_name
then
python manage.py runserver
It is because of virtual enviornment configuration. You need to work on your virtual enviornmnet of Python. You should try on your command promt with,
workon virtual_enviornment_name
File and Directory ownership conflict will cause issues here. Make sure the ownership of the directories and files under the project are to the current user. (You can change them using the chown command with the -R option.) Try rerunning the command: this solved the problem for me when running through the "First Django App" sample:
python manage.py startapp polls

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