conftest.py 导入错误：没有名为 Foo 的模块

Question

我有以下目录结构

/home/ubuntu/test/
 - Foo/
   - Foo.py
   - __init__.py
 - Test/
   - conftest.py
   - __init__.py
   - Foo/
     - test_Foo.py
     - __init__.py

Foo.py 包含

class Foo(object):
  def __init__(self):
    pass

conftest.py 包含：

import pytest

import sys
print sys.path

from Foo.Foo import Foo

@pytest.fixture(scope="session")
def foo():
  return Foo()

test_Foo.py 包含：

class TestFoo():
  def test___init__(self,foo):
    assert True

如果我运行 pytest 。在 Test 文件夹中，然后我收到一个错误，它找不到模块 Foo：

Traceback (most recent call last):
  File "/home/ubuntu/pythonVirtualEnv/local/lib/python2.7/site-packages/_pytest/config.py", line 379, in _importconftest
    mod = conftestpath.pyimport()
  File "/home/ubuntu/pythonVirtualEnv/local/lib/python2.7/site-packages/py/_path/local.py", line 662, in pyimport
    __import__(modname)
  File "/home/ubuntu/pythonVirtualEnv/local/lib/python2.7/site-packages/_pytest/assertion/rewrite.py", line 212, in load_module
    py.builtin.exec_(co, mod.__dict__)
  File "/home/ubuntu/pythonVirtualEnv/local/lib/python2.7/site-packages/py/_builtin.py", line 221, in exec_
    exec2(obj, globals, locals)
  File "<string>", line 7, in exec2
  File "/home/ubuntu/test/Test/conftest.py", line 6, in <module>
    from Foo.Foo import Foo
ImportError: No module named Foo
ERROR: could not load /home/ubuntu/test/Test/conftest.py

打印在 conftest.py 中的 sys.path 似乎包含 /home/ubuntu/test 路径，所以它应该能够找到 Foo.py，对吧？

问题是它仅在我将 conftest.py 移动到下面的文件夹时才有效。

我运行 pytest 3.2.2

Answer 1

该错误表示conftest.py无法加载，因为ImportError. 尝试在 foo 夹具中移动您的导入，如下所示：

import pytest
import sys
print sys.path


@pytest.fixture(scope="session")
def foo():
    from Foo.Foo import Foo
    return Foo()