空的Django项目出现错误：缺少1个必需的位置参数

Question

I just started to learn Django, created first project using django-admin startproject Returner and got an error trying to run it:

How I can solve that?

Possibly, the problem is related to multiple version of software. I have Python2.7 with Django 1.11 and Python3.5 with Django 2.0.

But I have properly set command line aliases from Python to Python3.5 , from pip to pip3.5 , and from django-admin to python /.../python3.5/.../django-admin.py

And generated files have the comment:

Generated by 'django-admin startproject' using Django 2.0.3.

And this code:

import sys
print('Python:')
print(sys.version)

import django
print('\nDjango:')
print(django.VERSION)

Turns into:

Python:
3.5.0b2 (v3.5.0b2:7a088af5615b, May 31 2015, 01:00:01) [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)]

Django:
(2, 0, 3, 'final', 0)

---

Update

I have set up Virtual Environment, added an App to my Project, but still get the same error when try to runserver or migrate . I hope someone will help me to solve this terrible problem, because it breaks all the plans of project development.

Answer 1

您是否运行了python manage.py migrate命令？

Answer 2

After lots of trials I think that the cause of the problem was a bug of my Python 3.5 release. The method get_models of the Apps class has this decorator:

@functools.lru_cache(maxsize=None)

Maybe the Python 3.5 implementation of this decorator hides the arguments of the methods.

To solve the problem, I just installed and used Python 3.7.