Python NoTests做另一个输出（ImportError），然后简单的单元测试（无错误）为什么？

当我仅使用unittest进行简单测试时，它不会显示任何错误。 但是，当我尝试测试我的测试文件时，它会产生一种可怕的效果。这是必要的信息

项目结构： Testfile-RomanDigitalConverterTest.py： Appfile:-roman数字转换器.py： 正常测试输出： 测试输出：

---

默认情况下，nose会对系统路径进行一些调整。您可以在此处找到一种可能的解决方案：

如果从项目结构中删除

\uuuu init\uuuu.py

：

/home/username/Development/learning/romannumeralconverter

---

目录，它应该可以工作。

你能提供

sys.path

的输出吗？我把sys.path包括在帖子里了。你有什么线索吗？非常感谢这是解决方案，它很有效！！

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import unittest
from romannumeralconverter.romannumeralconverter import RomanNumeralConverter

class RomanNumeralConverterTest(unittest.TestCase):
    def test_parsing_millenia(self):
        """Testing if millenia"""
        value = RomanNumeralConverter("M")
        self.assertEquals(1000, value.convert_to_decimal())

    #@unittest.skip("demonstrating skipping")
    def test_parsing_century(self):
        value = RomanNumeralConverter("C")
        self.assertEquals(100, value.convert_to_decimal())

    def test_parsing_half_century(self):
        value = RomanNumeralConverter("L")
        self.assertEquals(50, value.convert_to_decimal())

if __name__ == "__main__":
    suite = unittest.TestLoader().loadTestsFromTestCase(RomanNumeralConverterTest)
    unittest.TextTestRunner(verbosity=3).run(suite)

#!/usr/bin/env python
# -*- coding: utf-8 -*-

class RomanNumeralConverter(object):
    def __init__(self, roman_numeral):
        self.roman_numeral = roman_numeral
        self.digit_map = {"M": 1000, "D": 500, "C": 100, "L": 50, "X": 10, "V": 5, "I": 1}
        self.i_rule = ('V','X')
        self.x_rule = ('L','C')
        self.c_rule = ('D','M')
        self.rules = {"I": self.i_rule, "X": self.x_rule, "C": self.c_rule}

    def zwei_convert_to_decimal(self):
        val = 0
        oldelement = 0
        for char in self.roman_numeral:
            if oldelement != 0 and self.digit_map[char] > self.digit_map[oldelement]:
                pass
            oldelement = char

    def convert_to_decimal(self):
        val = 0
        for char in self.roman_numeral:
            val += self.digit_map[char]
        return val

▶ python romannumeralconvertertest.py
test_parsing_century (__main__.RomanNumeralConverterTest) ... ok
test_parsing_half_century (__main__.RomanNumeralConverterTest) ... ok
test_parsing_millenia (__main__.RomanNumeralConverterTest)
Testing if millenia ... ok

----------------------------------------------------------------------
Ran 3 tests in 0.000s

OK

▶ nosetests romannumeralconvertertest.py
E
======================================================================
ERROR: Failure: ImportError (cannot import name RomanNumeralConverter)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/nose/loader.py", line 420, in loadTestsFromName
    addr.filename, addr.module)
  File "/usr/lib/python2.7/dist-packages/nose/importer.py", line 47, in importFromPath
    return self.importFromDir(dir_path, fqname)
  File "/usr/lib/python2.7/dist-packages/nose/importer.py", line 94, in importFromDir
    mod = load_module(part_fqname, fh, filename, desc)
  File "/home/username/Development/learning/romannumeralconverter/tests/romannumeralconvertertest.py", line 5, in <module>
    from romannumeralconverter.romannumeralconverter import RomanNumeralConverter
ImportError: cannot import name RomanNumeralConverter

----------------------------------------------------------------------
Ran 1 test in 0.000s

FAILED (errors=1)

/home/username/Development/learning/romannumeralconverter/tests
/home/username/Development/learning/romannumeralconverter/tests
/home/username/Development/learning/romannumeralconverter
/usr/lib/python2.7
/usr/lib/python2.7/plat-x86_64-linux-gnu
/usr/lib/python2.7/lib-tk
/usr/lib/python2.7/lib-old
/usr/lib/python2.7/lib-dynload
/home/username/.local/lib/python2.7/site-packages
/usr/local/lib/python2.7/dist-packages
/usr/lib/python2.7/dist-packages
/usr/lib/python2.7/dist-packages/gtk-2.0
/usr/lib/python2.7/dist-packages/ubuntu-sso-client

/home/username/Development/learning/romannumeralconverter