解决 AttributeError: type object ‘Callable‘ has no attribute ‘_abc_registry‘

本来想安装一个库，但是不知怎么把pip版本升级了之后，一直报这个错误，尝试网上说的其他办法，但是因为和pip相关的全部命令都无法使用，所以无法删除typing，在目录下手动删除相关文件之后还是不行。后来使用如下命令用轮子安装旧版本的pip：

pip install --target=/root/anaconda3/envs/torch/lib/python3.6/site-packages pip-20.1-py2.py3-none-any.whl

注意不要添加 --user

根据这个网址，解释如下：

pundle uses --target pip feature to install package to dedicated path. So somewhere in your system --user option is configured. You need to turn it off. Also you can give a try to pyenv. I personally do not like system python distributions, especially from debian guys.

使用conda list查看pip版本，确实更新为20.1，但是下面这个错误还是没有解决……

(torch) root@1c113923969c:/data/WWW# pip -V
Traceback (most recent call last):
  File "/usr/bin/pip", line 11, in <module>
    load_entry_point('pip==20.0.2', 'console_scripts', 'pip')()
  File "/root/anaconda3/envs/torch/lib/python3.6/site-packages/pkg_resources/__init__.py", line 474, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/root/anaconda3/envs/torch/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2846, in load_entry_point
    return ep.load()
  File "/root/anaconda3/envs/torch/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2450, in load
    return self.resolve()
  File "/root/anaconda3/envs/torch/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2456, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/pip/_internal/cli/main.py", line 10, in <module>
    from pip._internal.cli.autocompletion import autocomplete
  File "/usr/lib/python3/dist-packages/pip/_internal/cli/autocompletion.py", line 9, in <module>
    from pip._internal.cli.main_parser import create_main_parser
  File "/usr/lib/python3/dist-packages/pip/_internal/cli/main_parser.py", line 7, in <module>
    from pip._internal.cli import cmdoptions
  File "/usr/lib/python3/dist-packages/pip/_internal/cli/cmdoptions.py", line 24, in <module>
    from pip._internal.exceptions import CommandError
  File "/usr/lib/python3/dist-packages/pip/_internal/exceptions.py", line 10, in <module>
    from pip._vendor.six import iteritems
  File "/usr/lib/python3/dist-packages/pip/_vendor/__init__.py", line 65, in <module>
    vendored("cachecontrol")
  File "/usr/lib/python3/dist-packages/pip/_vendor/__init__.py", line 36, in vendored
    __import__(modulename, globals(), locals(), level=0)
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 618, in _load_backward_compatible
  File "<frozen zipimport>", line 259, in load_module
  File "/usr/share/python-wheels/CacheControl-0.12.6-py2.py3-none-any.whl/cachecontrol/__init__.py", line 9, in <module>
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 618, in _load_backward_compatible
  File "<frozen zipimport>", line 259, in load_module
  File "/usr/share/python-wheels/CacheControl-0.12.6-py2.py3-none-any.whl/cachecontrol/wrapper.py", line 1, in <module>
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 618, in _load_backward_compatible
  File "<frozen zipimport>", line 259, in load_module
  File "/usr/share/python-wheels/CacheControl-0.12.6-py2.py3-none-any.whl/cachecontrol/adapter.py", line 5, in <module>
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 618, in _load_backward_compatible
  File "<frozen zipimport>", line 259, in load_module
  File "/usr/share/python-wheels/requests-2.22.0-py2.py3-none-any.whl/requests/__init__.py", line 95, in <module>
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 618, in _load_backward_compatible
  File "<frozen zipimport>", line 259, in load_module
  File "/usr/share/python-wheels/urllib3-1.25.8-py2.py3-none-any.whl/urllib3/contrib/pyopenssl.py", line 46, in <module>
  File "/root/anaconda3/envs/torch/lib/python3.6/site-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import crypto, SSL
  File "/root/anaconda3/envs/torch/lib/python3.6/site-packages/OpenSSL/crypto.py", line 8, in <module>
    from cryptography import utils, x509
  File "/root/anaconda3/envs/torch/lib/python3.6/site-packages/cryptography/utils.py", line 11, in <module>
    import typing
  File "/root/anaconda3/envs/torch/lib/python3.6/site-packages/typing.py", line 1359, in <module>
    class Callable(extra=collections_abc.Callable, metaclass=CallableMeta):
  File "/root/anaconda3/envs/torch/lib/python3.6/site-packages/typing.py", line 1007, in __new__
    self._abc_registry = extra._abc_registry
AttributeError: type object 'Callable' has no attribute '_abc_registry'

不过用轮子安装好了那个库，暂时可以正常使用了。

另一种安装方式：

python -m pip install pip==20.0.2 -i https://pypi.tuna.tsinghua.edu.cn/simple

然后在MobaXterm里使用命令pip -V查看pip版本：

(torch) ╭─root@1c113923969c ~
╰─# pip -V
pip 20.0.2 from /root/anaconda3/envs/torch/lib/python3.6/site-packages/pip (python 3.6)

然而在VsCode远程服务器上仍然报错：

Traceback (most recent call last):
  File "/root/anaconda3/envs/torch/bin/pip", line 5, in <module>
    from pip._internal.cli.main import main
  File "/usr/lib/python3/dist-packages/pip/_internal/cli/main.py", line 10, in <module>
    from pip._internal.cli.autocompletion import autocomplete
  File "/usr/lib/python3/dist-packages/pip/_internal/cli/autocompletion.py", line 9, in <module>
    from pip._internal.cli.main_parser import create_main_parser
  File "/usr/lib/python3/dist-packages/pip/_internal/cli/main_parser.py", line 7, in <module>
    from pip._internal.cli import cmdoptions
  File "/usr/lib/python3/dist-packages/pip/_internal/cli/cmdoptions.py", line 28, in <module>
    from pip._internal.models.target_python import TargetPython
  File "/usr/lib/python3/dist-packages/pip/_internal/models/target_python.py", line 4, in <module>
    from pip._internal.utils.misc import normalize_version_info
  File "/usr/lib/python3/dist-packages/pip/_internal/utils/misc.py", line 23, in <module>
    from pip._vendor.retrying import retry  # type: ignore
ModuleNotFoundError: No module named 'pip._vendor.retrying'