尝试安装 biopython 后，Conda 返回找不到属性错误符号

Question

我一直在尝试让 biopython 工作，似乎我在此过程中破坏了 conda。此时将显示 conda 的帮助菜单，conda --version 返回conda 4.7.5，但包括conda info 在内的任何其他内容都会引发错误AttributeError: dlsym(0x1004381c0, archive_read_open_filename_w): symbol not found

这是在 Mac OS 10.14.4 上。 Conda 刚刚工作，我上次用它来安装 biopython 没有错误conda install -c conda-forge biopython。运行import Bio 仍会导致ImportError: No module named Bio。所以在故障排除中我跑了pip uninstall biopython（它说它成功卸载了biopython-1.73）和pip install biopython返回：

Requirement already satisfied: biopython in /Users/dmattox/anaconda/lib/python2.7/site-packages (1.73)
Requirement already satisfied: numpy in /Users/dmattox/anaconda/lib/python2.7/site-packages (from biopython) (1.13.1)

然后我尝试再次使用 conda 安装 conda install -c conda-forge biopython，它返回了与我在上面从 conda info 显示的相同的错误。每当我现在尝试将 conda 用于任何事情时，都会出现此 AttributeError。我在下面包含了回溯。有什么建议吗？

Traceback (most recent call last):
  File "/Users/dmattox/anaconda/bin/conda", line 13, in <module>
    sys.exit(main())
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/conda/cli/main.py", line 150, in main
    return conda_exception_handler(_main, *args, **kwargs)
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/conda/exceptions.py", line 1335, in conda_exception_handler
    return_value = exception_handler(func, *args, **kwargs)
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/conda/exceptions.py", line 1046, in __call__
    return self.handle_exception(exc_val, exc_tb)
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/conda/exceptions.py", line 1090, in handle_exception
    return self.handle_unexpected_exception(exc_val, exc_tb)
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/conda/exceptions.py", line 1101, in handle_unexpected_exception
    self.print_unexpected_error_report(error_report)
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/conda/exceptions.py", line 1171, in print_unexpected_error_report
    from .cli.main_info import get_env_vars_str, get_main_info_str
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/conda/cli/main_info.py", line 19, in <module>
    from ..core.index import _supplement_index_with_system
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/conda/core/index.py", line 9, in <module>
    from .package_cache_data import PackageCacheData
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/conda/core/package_cache_data.py", line 15, in <module>
    from conda_package_handling.api import InvalidArchiveError
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/conda_package_handling/api.py", line 3, in <module>
    from libarchive.exception import ArchiveError as _LibarchiveArchiveError
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/libarchive/__init__.py", line 1, in <module>
    from .entry import ArchiveEntry
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/libarchive/entry.py", line 6, in <module>
    from . import ffi
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/libarchive/ffi.py", line 184, in <module>
    c_int, check_int)
  File "/Users/dmattox/anaconda/lib/python2.7/site-packages/libarchive/ffi.py", line 95, in ffi
    f = getattr(libarchive, 'archive_'+name)
  File "/Users/dmattox/anaconda/lib/python2.7/ctypes/__init__.py", line 375, in __getattr__
    func = self.__getitem__(name)
  File "/Users/dmattox/anaconda/lib/python2.7/ctypes/__init__.py", line 380, in __getitem__
    func = self._FuncPtr((name_or_ordinal, self))
AttributeError: dlsym(0x100548400, archive_read_open_filename_w): symbol not found

Answer 1

通过zhihu的方法修复了我的错误

以下是我的解决方法，希望对你有所帮助：

Mac上出现这个错误的原因是之前安装了Python，我尝试删除所有的python和Anaconda文件，重新安装anaconda，然后运行conda命令成功。

1. 从 Macintouch->Frameworks->PythonFramework->Versions->3.x 中删除 python
2. 删除.bash_profile中所有关于python和anaconda的记录（shift+command+找到这个隐藏文件）
3. 在应用程序中删除 anaconda 导航器
4. 再次安装 Anaconda