亲戚进口的排序顺序？

Question

在 python 中对 相对导入 进行排序的正确方法或 PEP 方法是什么？

core/
    __init__.py
    forms.py
    models.py
    tests/
        __init__.py
        form_tests/
             __init__.py
            test_xpto.py
        login.py

如果我正在使用 test_xpto.py 并想导入其他文件，正确的方法是什么：

from core.models import Person
from ..login import DefaultLogin
from ...forms import CustomerForm

或

from ...forms import CustomerForm
from ..login import DefaultLogin
from core.models import Person

或者不是其中任何一个？

Answer 1

我得到了这个问题的一些答案。根据 PEP 328 [1]，Guido 是否发音为 "relative imports will use leading dots. A single leading dot indicates a relative import, starting with the current package. Two or more leading dots give a relative import to the parent(s) of the current package, one level per dot after the first" [2]。这是一个示例包布局：

from .moduleY import spam
from .moduleY import spam as ham
from . import moduleY
from ..subpackage1 import moduleY
from ..subpackage2.moduleZ import eggs
from ..moduleA import foo
from ...package import bar
from ...sys import path

另一个好主意是 isort（一个 Python 实用程序/库，用于按字母顺序对导入进行排序，并自动分成多个部分）[3]，它对导入进行排序遵循了另一种模式，它被像 Django 这样的大项目 [4]:

from __future__ import absolute_import

import os
import sys

from my_lib import Object, Object2, Object3
from third_party import (lib1, lib2, lib3, lib4, lib5, lib6, lib7, lib8, lib9,
                         lib10, lib11, lib12, lib13, lib14, lib15)

from . import moduleY
from ...sys import path
from ..subpackage1 import moduleY
from ..subpackage2.moduleZ import eggs
from .moduleY import spam as ham

[1] https://www.python.org/dev/peps/pep-0328/#guido-s-decision

[2] https://mail.python.org/pipermail/python-dev/2004-March/043739.html

[3] https://github.com/timothycrosley/isort

[4]https://github.com/timothycrosley/isort/wiki/Projects-Using-isort

亲戚进口的排序顺序？

Sort order of relatives imports?

python

python-import

pep