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python - 使用 pip 安装时出现错误消息但 pip 安装仍然成功

问题描述

每当我尝试安装 pip 包 ( pip install <package_name>) 时，我都会收到以下错误消息。但是，该软件包仍然可以成功安装。

我正在使用python 3.7。

ERROR: Error checking for conflicts.
Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 3021, in _dep_map
    return self.__dep_map
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2815, in __getattr__
    raise AttributeError(attr)
AttributeError: _DistInfoDistribution__dep_map

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 3012, in _parsed_pkg_info
    return self._pkg_info
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2815, in __getattr__
    raise AttributeError(attr)
AttributeError: _pkg_info

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_internal\commands\install.py", line 512, in _warn_about_conflicts
    package_set, _dep_info = check_install_conflicts(to_install)
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_internal\operations\check.py", line 114, in check_install_conflicts
    package_set, _ = create_package_set_from_installed()
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_internal\operations\check.py", line 53, in create_package_set_from_installed
    package_set[name] = PackageDetails(dist.version, dist.requires())
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2736, in requires
    dm = self._dep_map
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 3023, in _dep_map
    self.__dep_map = self._compute_dependencies()
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 3032, in _compute_dependencies
    for req in self._parsed_pkg_info.get_all('Requires-Dist') or []:
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 3014, in _parsed_pkg_info
    metadata = self.get_metadata(self.PKG_INFO)
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 1420, in get_metadata
    value = self._get(path)
  File "C:\ProgramData\Anaconda3\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 1616, in _get
    with open(path, 'rb') as stream:
FileNotFoundError: [Errno 2] No such file or directory: 'c:\\programdata\\Anaconda3\\lib\\site-packages\\numpy-1.18.4.dist-info\\METADATA'

标签： pythonpython-3.xpip

解决方案

降级版本testpath：

conda install 'testpath<0.4'

有关该问题的更多详细信息：https ://github.com/conda-forge/testpath-feedstock/issues/7

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