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HarmonyOS
我有一个新的 Python 项目，其中有一个 models.py 文件，如下所示：
from django.db import models
from django.contrib.auth.models import User
from django.core.validators import MinValueValidator, MaxValueValidator
class Metric(models.Model):
users = models.ManyToManyField(User, through = 'Vote')
name = models.CharField(max_length = 255)
class Vote(models.Model):
metric = models.ForeignKey(Metric, on_delete = models.CASCADE)
user = models.ForeignKey(User, on_delete = models.CASCADE)
rating = models.IntegerField(validators = [MinValueValidator(0), MaxValueValidator(10)])
email = models.EmailField
def __str__(self):
return str(self.rating)
和一个像这样的 admin.py 文件：
from django.contrib import admin
from models import Metric, Vote
admin.site.register(Metric)
admin.site.register(Vote)
当使用 Python 2.7.5 运行它时，启动应用程序工作正常。当我尝试使用 Python 3.5.1 运行它时，我收到错误 ImportError: No module named 'models' ，回溯：
Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x103bd2b70>
Traceback (most recent call last):
File "/Users/sashacooper/pyenv/lib/python3.5/site-packages/django/utils/autoreload.py", line 226, in wrapper
fn(*args, **kwargs)
File "/Users/sashacooper/pyenv/lib/python3.5/site-packages/django/core/management/commands/runserver.py", line 113, in inner_run
autoreload.raise_last_exception()
File "/Users/sashacooper/pyenv/lib/python3.5/site-packages/django/utils/autoreload.py", line 249, in raise_last_exception
six.reraise(*_exception)
File "/Users/sashacooper/pyenv/lib/python3.5/site-packages/django/utils/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/Users/sashacooper/pyenv/lib/python3.5/site-packages/django/utils/autoreload.py", line 226, in wrapper
fn(*args, **kwargs)
File "/Users/sashacooper/pyenv/lib/python3.5/site-packages/django/__init__.py", line 27, in setup
apps.populate(settings.INSTALLED_APPS)
File "/Users/sashacooper/pyenv/lib/python3.5/site-packages/django/apps/registry.py", line 115, in populate
app_config.ready()
File "/Users/sashacooper/pyenv/lib/python3.5/site-packages/django/contrib/admin/apps.py", line 23, in ready
self.module.autodiscover()
File "/Users/sashacooper/pyenv/lib/python3.5/site-packages/django/contrib/admin/__init__.py", line 26, in autodiscover
autodiscover_modules('admin', register_to=site)
File "/Users/sashacooper/pyenv/lib/python3.5/site-packages/django/utils/module_loading.py", line 50, in autodiscover_modules
import_module('%s.%s' % (app_config.name, module_to_search))
File "/Users/sashacooper/pyenv/lib/python3.5/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 986, in _gcd_import
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 662, in exec_module
File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
File "/Users/sashacooper/Desktop/pogroms/crockerometer2/crockerometer/admin.py", line 2, in <module>
from models import Metric, Vote
我已经尝试将 from __future__ import absolute_import 添加到每个标题相似的 Stack Overflow 帖子的 admin.py 文件的开头，但它并没有改变错误。是什么原因造成的？
原文由 Arepo 发布，翻译遵循 CC BY-SA 4.0 许可协议
在 Python 3 中，您必须在使用相对导入时告诉它：