当我试图加载一个腌制清单时，它说：
>>> import pickle
>>> with open('tests/unit/support/modules_state.samples2.6') as f:
... print(pickle.load(f))
...
Traceback (most recent call last):
File "<console>", line 2, in <module>
File "/usr/lib/python2.6/pickle.py", line 1370, in load
return Unpickler(file).load()
File "/usr/lib/python2.6/pickle.py", line 858, in load
dispatch[key](self)
File "/usr/lib/python2.6/pickle.py", line 1083, in load_newobj
obj = cls.__new__(cls, *args)
TypeError: __new__() takes exactly 1 argument (2 given)
这是加载/转储pickle列表的代码：
class FakeModuleNameGenerator(str):
def __new__(cls):
return super(FakeModuleNameGenerator, cls).__new__(cls, binascii.b2a_hex(os.urandom(15)))
class FakeModule(object):
def __new__(cls, *args, **kwargs):
return choice([object(), TestDouble()])
class SamplesIterator(object):
MAX_SAMPLE_LENGTH = os.getenv('MAX_SAMPLE_LENGTH', 12) if is_executing_under_continuous_integration_server() else 6
def __iter__(self):
for sample_length in range(1, SamplesIterator.MAX_SAMPLE_LENGTH):
combinations = [(FakeModuleNameGenerator(), FakeModule()) for i in range(0, sample_length)]
for r in range(1, sample_length + 1):
logger.info("Generating sample in length %d with r=%d" % (sample_length, r))
yield itertools.combinations_with_replacement(combinations, r)
def load_samples():
if is_executing_under_continuous_integration_server() and os.getenv('USE_CACHES_SAMPLES', 'false') != 'true':
list(itertools.chain.from_iterable(SamplesIterator()))
import platform
version = '%s.%s' % (
sys.version_info[0], sys.version_info[1]) if platform.python_implementation() != 'PyPy' else 'pypy'
samples_file = '%s%s' % (get_support_path(), 'modules_state.samples-%s' % version)
if os.path.exists(samples_file) and os.path.getsize(samples_file) == 0 or not os.path.exists(samples_file):
with open(samples_file, 'wb') as f:
samples = list(itertools.chain.from_iterable(SamplesIterator()))
try:
return samples
finally:
pickle.dump(samples, f, pickle.HIGHEST_PROTOCOL)
else:
with open(samples_file, 'rb') as f:
return pickle.load(f)
如您所见，我正在以二进制模式阅读和写作。
这是加载列表之前相同代码的完整tox输出（当代码第一次执行时。之后缓存列表）：
/usr/bin/python2.7 /usr/local/bin/tox
GLOB sdist-make: /home/omer/Documents/Projects/Python/nose2-testsuite/setup.py
py26 inst-nodeps: /home/omer/Documents/Projects/Python/nose2-testsuite/.tox/dist/nose2-testsuite-0.1.0.zip
py26 runtests: commands[0]
.................................................................................................................................
----------------------------------------------------------------------
Ran 129 tests in 0.034s
OK
py27 inst-nodeps: /home/omer/Documents/Projects/Python/nose2-testsuite/.tox/dist/nose2-testsuite-0.1.0.zip
py27 runtests: commands[0]
.................................................................................................................................
----------------------------------------------------------------------
Ran 129 tests in 0.029s
OK
py33 inst-nodeps: /home/omer/Documents/Projects/Python/nose2-testsuite/.tox/dist/nose2-testsuite-0.1.0.zip
py33 runtests: commands[0]
.................................................................................................................................
----------------------------------------------------------------------
Ran 129 tests in 0.034s
OK
pypy inst-nodeps: /home/omer/Documents/Projects/Python/nose2-testsuite/.tox/dist/nose2-testsuite-0.1.0.zip
pypy runtests: commands[0]
.................................................................................................................................
----------------------------------------------------------------------
Ran 129 tests in 0.058s
OK
___________________________________ summary ____________________________________
py26: commands succeeded
py27: commands succeeded
py33: commands succeeded
pypy: commands succeeded
congratulations :)
Process finished with exit code 0
我们都很开心因为一切正常吗？ 现在，当再次运行tox时，结果如下：
/usr/bin/python2.7 /usr/local/bin/tox
GLOB sdist-make: /home/omer/Documents/Projects/Python/nose2-testsuite/setup.py
py26 inst-nodeps: /home/omer/Documents/Projects/Python/nose2-testsuite/.tox/dist/nose2-testsuite-0.1.0.zip
py26 runtests: commands[0]
EE...........
======================================================================
ERROR: tests.functional.test_isolators (nose2.loader.ModuleImportFailure)
----------------------------------------------------------------------
ImportError: Failed to import test module: tests.functional.test_isolators
Traceback (most recent call last):
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py26/lib/python2.6/site-packages/nose2/plugins/loader/discovery.py", line 188, in _find_tests_in_file
module = util.module_from_name(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py26/lib/python2.6/site-packages/nose2/util.py", line 78, in module_from_name
__import__(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/functional/test_isolators.py", line 14, in <module>
for current_modules_state in load_samples():
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/common/support/isolators.py", line 63, in load_samples
return pickle.load(f)
File "/usr/lib/python2.6/pickle.py", line 1370, in load
return Unpickler(file).load()
File "/usr/lib/python2.6/pickle.py", line 858, in load
dispatch[key](self)
File "/usr/lib/python2.6/pickle.py", line 1083, in load_newobj
obj = cls.__new__(cls, *args)
TypeError: __new__() takes exactly 1 argument (2 given)
======================================================================
ERROR: tests.unit.test_isolators (nose2.loader.ModuleImportFailure)
----------------------------------------------------------------------
ImportError: Failed to import test module: tests.unit.test_isolators
Traceback (most recent call last):
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py26/lib/python2.6/site-packages/nose2/plugins/loader/discovery.py", line 188, in _find_tests_in_file
module = util.module_from_name(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py26/lib/python2.6/site-packages/nose2/util.py", line 78, in module_from_name
__import__(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/unit/test_isolators.py", line 48, in <module>
for current_modules_state in load_samples():
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/common/support/isolators.py", line 63, in load_samples
return pickle.load(f)
File "/usr/lib/python2.6/pickle.py", line 1370, in load
return Unpickler(file).load()
File "/usr/lib/python2.6/pickle.py", line 858, in load
dispatch[key](self)
File "/usr/lib/python2.6/pickle.py", line 1083, in load_newobj
obj = cls.__new__(cls, *args)
TypeError: __new__() takes exactly 1 argument (2 given)
----------------------------------------------------------------------
Ran 13 tests in 0.002s
FAILED (errors=2)
ERROR: InvocationError: '/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py26/bin/nose2'
py27 inst-nodeps: /home/omer/Documents/Projects/Python/nose2-testsuite/.tox/dist/nose2-testsuite-0.1.0.zip
py27 runtests: commands[0]
EE...........
======================================================================
ERROR: tests.functional.test_isolators (nose2.loader.ModuleImportFailure)
----------------------------------------------------------------------
ImportError: Failed to import test module: tests.functional.test_isolators
Traceback (most recent call last):
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py27/local/lib/python2.7/site-packages/nose2/plugins/loader/discovery.py", line 188, in _find_tests_in_file
module = util.module_from_name(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py27/local/lib/python2.7/site-packages/nose2/util.py", line 78, in module_from_name
__import__(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/functional/test_isolators.py", line 14, in <module>
for current_modules_state in load_samples():
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/common/support/isolators.py", line 63, in load_samples
return pickle.load(f)
File "/usr/lib/python2.7/pickle.py", line 1378, in load
return Unpickler(file).load()
File "/usr/lib/python2.7/pickle.py", line 858, in load
dispatch[key](self)
File "/usr/lib/python2.7/pickle.py", line 1083, in load_newobj
obj = cls.__new__(cls, *args)
TypeError: __new__() takes exactly 1 argument (2 given)
======================================================================
ERROR: tests.unit.test_isolators (nose2.loader.ModuleImportFailure)
----------------------------------------------------------------------
ImportError: Failed to import test module: tests.unit.test_isolators
Traceback (most recent call last):
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py27/local/lib/python2.7/site-packages/nose2/plugins/loader/discovery.py", line 188, in _find_tests_in_file
module = util.module_from_name(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py27/local/lib/python2.7/site-packages/nose2/util.py", line 78, in module_from_name
__import__(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/unit/test_isolators.py", line 48, in <module>
for current_modules_state in load_samples():
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/common/support/isolators.py", line 63, in load_samples
return pickle.load(f)
File "/usr/lib/python2.7/pickle.py", line 1378, in load
return Unpickler(file).load()
File "/usr/lib/python2.7/pickle.py", line 858, in load
dispatch[key](self)
File "/usr/lib/python2.7/pickle.py", line 1083, in load_newobj
obj = cls.__new__(cls, *args)
TypeError: __new__() takes exactly 1 argument (2 given)
----------------------------------------------------------------------
Ran 13 tests in 0.002s
FAILED (errors=2)
ERROR: InvocationError: '/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py27/bin/nose2'
py33 inst-nodeps: /home/omer/Documents/Projects/Python/nose2-testsuite/.tox/dist/nose2-testsuite-0.1.0.zip
py33 runtests: commands[0]
EE...........
======================================================================
ERROR: tests.functional.test_isolators (nose2.loader.ModuleImportFailure)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib/python3.3/unittest/case.py", line 385, in _executeTestPart
function()
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py33/lib/python3.3/site-packages/nose2/loader.py", line 113, in testFailure
raise exception
ImportError: Failed to import test module: tests.functional.test_isolators
Traceback (most recent call last):
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py33/lib/python3.3/site-packages/nose2/plugins/loader/discovery.py", line 188, in _find_tests_in_file
module = util.module_from_name(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py33/lib/python3.3/site-packages/nose2/util.py", line 78, in module_from_name
__import__(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/functional/test_isolators.py", line 14, in <module>
for current_modules_state in load_samples():
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/common/support/isolators.py", line 63, in load_samples
return pickle.load(f)
TypeError: __new__() takes 1 positional argument but 2 were given
======================================================================
ERROR: tests.unit.test_isolators (nose2.loader.ModuleImportFailure)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib/python3.3/unittest/case.py", line 385, in _executeTestPart
function()
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py33/lib/python3.3/site-packages/nose2/loader.py", line 113, in testFailure
raise exception
ImportError: Failed to import test module: tests.unit.test_isolators
Traceback (most recent call last):
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py33/lib/python3.3/site-packages/nose2/plugins/loader/discovery.py", line 188, in _find_tests_in_file
module = util.module_from_name(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py33/lib/python3.3/site-packages/nose2/util.py", line 78, in module_from_name
__import__(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/unit/test_isolators.py", line 48, in <module>
for current_modules_state in load_samples():
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/common/support/isolators.py", line 63, in load_samples
return pickle.load(f)
TypeError: __new__() takes 1 positional argument but 2 were given
----------------------------------------------------------------------
Ran 13 tests in 0.002s
FAILED (errors=2)
ERROR: InvocationError: '/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/py33/bin/nose2'
pypy inst-nodeps: /home/omer/Documents/Projects/Python/nose2-testsuite/.tox/dist/nose2-testsuite-0.1.0.zip
pypy runtests: commands[0]
EE...........
======================================================================
ERROR: tests.functional.test_isolators (nose2.loader.ModuleImportFailure)
----------------------------------------------------------------------
ImportError: Failed to import test module: tests.functional.test_isolators
Traceback (most recent call last):
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/pypy/site-packages/nose2/plugins/loader/discovery.py", line 188, in _find_tests_in_file
module = util.module_from_name(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/pypy/site-packages/nose2/util.py", line 78, in module_from_name
__import__(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/functional/test_isolators.py", line 14, in <module>
ERROR: InvocationError: '/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/pypy/bin/nose2'
for current_modules_state in load_samples():
___________________________________ summary ____________________________________
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/common/support/isolators.py", line 63, in load_samples
ERROR: py26: commands failed
return pickle.load(f)
ERROR: py27: commands failed
File "/usr/lib/pypy/lib-python/2.7/pickle.py", line 1421, in load
ERROR: py33: commands failed
return Unpickler(file).load()
ERROR: pypy: commands failed
File "/usr/lib/pypy/lib-python/2.7/pickle.py", line 901, in load
dispatch[key](self)
File "/usr/lib/pypy/lib-python/2.7/pickle.py", line 1126, in load_newobj
obj = cls.__new__(cls, *args)
TypeError: __new__() takes exactly 1 argument (2 given)
======================================================================
ERROR: tests.unit.test_isolators (nose2.loader.ModuleImportFailure)
----------------------------------------------------------------------
ImportError: Failed to import test module: tests.unit.test_isolators
Traceback (most recent call last):
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/pypy/site-packages/nose2/plugins/loader/discovery.py", line 188, in _find_tests_in_file
module = util.module_from_name(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/.tox/pypy/site-packages/nose2/util.py", line 78, in module_from_name
__import__(name)
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/unit/test_isolators.py", line 48, in <module>
for current_modules_state in load_samples():
File "/home/omer/Documents/Projects/Python/nose2-testsuite/tests/common/support/isolators.py", line 63, in load_samples
return pickle.load(f)
File "/usr/lib/pypy/lib-python/2.7/pickle.py", line 1421, in load
return Unpickler(file).load()
File "/usr/lib/pypy/lib-python/2.7/pickle.py", line 901, in load
dispatch[key](self)
File "/usr/lib/pypy/lib-python/2.7/pickle.py", line 1126, in load_newobj
obj = cls.__new__(cls, *args)
TypeError: __new__() takes exactly 1 argument (2 given)
----------------------------------------------------------------------
Ran 13 tests in 0.004s
FAILED (errors=2)
Process finished with exit code 1
答案 0 :(得分：4)
我找到了它！
问题在于：
class FakeModuleNameGenerator(str):
@classmethod
def __new__(cls, *args, **kwargs):
return str(binascii.b2a_hex(os.urandom(15)))
由于这继承自str，__new__必须接受另一个参数。
卫生署！