标签:python-unittest python python-2-7 jupyter-notebook ipython-notebook
我给出了一个在ipython / jupyter笔记本中抛出错误的示例,但作为单个脚本运行正常.
import unittest
class Samples(unittest.TestCase):
def testToPow(self):
pow3 = 3**3
assert pow3==27
if __name__ == '__main__':
unittest.main()
错误如下:
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-7-232db94ae8b2> in <module>()
8
9 if __name__ == '__main__':
---> 10 unittest.main()
/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/unittest/main.pyc in __init__(self, module, defaultTest, argv, testRunner, testLoader, exit, verbosity, failfast, catchbreak, buffer)
92 self.testLoader = testLoader
93 self.progName = os.path.basename(argv[0])
---> 94 self.parseArgs(argv)
95 self.runTests()
96
/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/unittest/main.pyc in parseArgs(self, argv)
147 else:
148 self.testNames = (self.defaultTest,)
--> 149 self.createTests()
150 except getopt.error, msg:
151 self.usageExit(msg)
/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/unittest/main.pyc in createTests(self)
156 else:
157 self.test = self.testLoader.loadTestsFromNames(self.testNames,
--> 158 self.module)
159
160 def _do_discovery(self, argv, Loader=None):
/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/unittest/loader.pyc in loadTestsFromNames(self, names, module)
128 of string specifiers. See 'loadTestsFromName()'.
129 """
--> 130 suites = [self.loadTestsFromName(name, module) for name in names]
131 return self.suiteClass(suites)
132
/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/unittest/loader.pyc in loadTestsFromName(self, name, module)
98 obj = module
99 for part in parts:
--> 100 parent, obj = obj, getattr(obj, part)
101
102 if isinstance(obj, types.ModuleType):
AttributeError: 'module' object has no attribute '/Users/root3d/Library/Jupyter/runtime/kernel-c5225ac4-4b0e-4473-ae0a-3e051a704561'
可能出现什么问题?那么我应该怎么在笔记本上写测试呢?
解决方法:
unittest.main默认查看sys.argv,这是启动IPython的内容,因此内核连接文件的错误不是有效属性.您可以将显式列表传递给main,以避免查找sys.argv.
在笔记本中,您还需要包含exit = False以防止unittest.main尝试关闭内核进程:
unittest.main(argv=['first-arg-is-ignored'], exit=False)
您可以在argv列表中传递更多参数,例如
unittest.main(argv=['ignored', '-v'], exit=False)
标签:python-unittest,python,python-2-7,jupyter-notebook,ipython-notebook 来源: https://codeday.me/bug/20191004/1853545.html
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