尝试在Python 3.8中导入pytest会失败,并出现以下错误:
>>> import pytest
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\site-packages\pytest\__init__.py", line 6, in <module>
from _pytest.assertion import register_assert_rewrite
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\site-packages\_pytest\assertion\__init__.py", line 7, in <module>
from _pytest.assertion import rewrite
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\site-packages\_pytest\assertion\rewrite.py", line 24, in <module>
from _pytest.assertion import util
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\site-packages\_pytest\assertion\util.py", line 14, in <module>
import _pytest._code
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\site-packages\_pytest\_code\__init__.py", line 2, in <module>
from .code import Code # noqa
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\site-packages\_pytest\_code\code.py", line 28, in <module>
import pluggy
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\site-packages\pluggy\__init__.py", line 16, in <module>
from .manager import PluginManager, PluginValidationError
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\site-packages\pluggy\manager.py", line 6, in <module>
import importlib_metadata
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\site-packages\importlib_metadata\__init__.py", line 478, in <module>
__version__ = version(__name__)
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\site-packages\importlib_metadata\__init__.py", line 445, in version
return distribution(package).version
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\site-packages\importlib_metadata\__init__.py", line 418, in distribution
return Distribution.from_name(package)
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\site-packages\importlib_metadata\__init__.py", line 179, in from_name
dists = resolver(name)
File "<frozen importlib._bootstrap_external>", line 1382, in find_distributions
File "C:\Users\Al\AppData\Local\Programs\Python\Python38\lib\importlib\metadata.py", line 379, in find_distributions
found = cls._search_paths(context.pattern, context.path)
AttributeError: 'str' object has no attribute 'pattern'
我该如何解决这个问题?