问题
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
Can somebody please help me?
Update: 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)
回答1:
Make sure which python version you connect the django with.
When you install django using just pip install django, then you have to run python manage.py startapp else if you used pip3Click here to view terminal example install django, then you have to run python3 manage.py startapp
回答2:
You can try with python3 manage.py runserver.
It works for me.
回答3:
you should activate your virtual environment . In terminal -> source env/bin/activate now there will be ----> (env) in your terminal displayed !
now it will work -> runserver .
No need to delete exc part !
回答4:
I was experiencing the same but this was solved by running with specific python 3.6 as below:
python3.6 manage.py runserver
回答5:
Its a simple solution actually one i just ran into. Did you activate your virtual environment?
my terminal screenshot
回答6:
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.
回答7:
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 testInstall and Create a Virtual environment.
python3 -m pip install virtualenv virtualenv venv -p python3Activate Virtual Environment:
source venv/bin/activateInstall Django:
pip install djangoStart a new project:
django-admin startproject myprojectcd to your project and Run Project:
cd myproject,python manage.py runserverYou can see your project here :
http://127.0.0.1:8000/
回答8:
Just delete that from exec part to now have something like
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?"
)
execute_from_command_line(sys.argv)
回答9:
You must activate virtual environment where you have installed django. Then run this command - python manage.py runserver
回答10:
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
回答11:
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://docs.pipenv.org/
回答12:
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🎉
回答13:
We have to create a virtual environment inside the project, not outside the project.. Then it will solve..
回答14:
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.
I hope this helps.
回答15:
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.
回答16:
I landed on the same exact exception because I forgot to activate the virtual environment.
回答17:
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
回答18:
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
回答19:
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.
回答20:
Have you entered the virtual environment for django? Run python -m venv myvenv if you have not yet installed.
回答21:
Just do:
pipenv shell
then repeat:
python manage.py runserver
and don't delete from exc as suggested above.
cheers!
回答22:
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).
回答23:
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.
回答24:
activate env by the Following Command
source pathetoYourEnv/bin/activate
then run command
python manage.py runserver
回答25:
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.
回答26:
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
回答27:
just you describe your python version
=> python3.5 manage.py runserver
(my python version=3.5)
来源：https://stackoverflow.com/questions/42611593/how-to-solve-syntaxerror-on-autogenerated-manage-py