python - docker python 官方示例错误

Question

我正在学习 docker，我想制作我的 python django docker 镜像以在我的 mac 中运行 我创建了 3 个文件:

1:docker-compose

version: '3'
services:
  db:
    image: postgres
  web:
    build: .
    command: python3 manage.py runserver 0.0.0.0:8000
    volumes:
      - .:/code
    ports:
      - "8000:8000"
    depends_on:
      - db

2:Dockerfile

FROM python:3
ENV PYTHONUNBUFFERED 1
RUN mkdir /code
WORKDIR /code
ADD requirements.txt /code/
RUN pip install -r requirements.txt
ADD . /code/

3:要求

Django>=1.8,<2.0
psycopg2

然后我运行sudo docker-compose run web django-admin.py startproject composeexample。我已经在我的目录中创建了官方示例文件

但是当我运行docker-compose

我收到错误并且运行失败

web_1  | Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x7fcafcf47510>
web_1  | Traceback (most recent call last):
web_1  |   File "/usr/local/lib/python3.7/site-packages/django/utils/autoreload.py", line 228, in wrapper
web_1  |     fn(*args, **kwargs)
web_1  |   File "/usr/local/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 116, in inner_run
web_1  |     autoreload.raise_last_exception()
web_1  |   File "/usr/local/lib/python3.7/site-packages/django/utils/autoreload.py", line 251, in raise_last_exception
web_1  |     six.reraise(*_exception)
web_1  |   File "/usr/local/lib/python3.7/site-packages/django/utils/six.py", line 685, in reraise
web_1  |     raise value.with_traceback(tb)
web_1  |   File "/usr/local/lib/python3.7/site-packages/django/utils/autoreload.py", line 228, in wrapper
web_1  |     fn(*args, **kwargs)
web_1  |   File "/usr/local/lib/python3.7/site-packages/django/__init__.py", line 27, in setup
web_1  |     apps.populate(settings.INSTALLED_APPS)
web_1  |   File "/usr/local/lib/python3.7/site-packages/django/apps/registry.py", line 85, in populate
web_1  |     app_config = AppConfig.create(entry)
web_1  |   File "/usr/local/lib/python3.7/site-packages/django/apps/config.py", line 94, in create
web_1  |     module = import_module(entry)
web_1  |   File "/usr/local/lib/python3.7/importlib/__init__.py", line 127, in import_module
web_1  |     return _bootstrap._gcd_import(name[level:], package, level)
web_1  |   File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
web_1  |   File "<frozen importlib._bootstrap>", line 983, in _find_and_load
web_1  |   File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
web_1  |   File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
web_1  |   File "<frozen importlib._bootstrap_external>", line 728, in exec_module
web_1  |   File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
web_1  |   File "/usr/local/lib/python3.7/site-packages/django/contrib/admin/__init__.py", line 4, in <module>
web_1  |     from django.contrib.admin.filters import (
web_1  |   File "/usr/local/lib/python3.7/site-packages/django/contrib/admin/filters.py", line 10, in <module>
web_1  |     from django.contrib.admin.options import IncorrectLookupParameters
web_1  |   File "/usr/local/lib/python3.7/site-packages/django/contrib/admin/options.py", line 13, in <module>
web_1  |     from django.contrib.admin import helpers, widgets
web_1  |   File "/usr/local/lib/python3.7/site-packages/django/contrib/admin/widgets.py", line 152
web_1  |     '%s=%s' % (k, v) for k, v in params.items(),
web_1  |     ^
web_1  | SyntaxError: Generator expression must be parenthesized

现在有人可以帮我吗？我很困惑。 谢谢。

Answer 1

尽管将我的requirements.txt 文件更改为:

，我仍然收到该错误

Django >=2

psycopg2

还有其他建议吗？我几乎没有想法了。我一直在使用https://docs.docker.com/compose/django/#connect-the-database 。据我所知，我已经根据该网页按照书本做了所有事情。