AttributeError：模块“importlib._bootstrap”没有属性“SourceFileLoader”

Question

我是编程新手，所以我遇到了这个麻烦。我升级了我的 pip，然后使用 pip list、ipython Notebook、jupyter Notebook 来使用 anaconda，所以在所有这些命令之后我得到了一个答案：

Traceback (most recent call last):
  File "/home/bakhytgul/anaconda3/bin/pip", line 7, in <module>
    from pip._internal import main
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/pip/_internal/__init__.py", line 40, in <module>
    from pip._internal.cli.autocompletion import autocomplete
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/pip/_internal/cli/autocompletion.py", line 8, in <module>
    from pip._internal.cli.main_parser import create_main_parser
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/pip/_internal/cli/main_parser.py", line 12, in <module>
    from pip._internal.commands import (
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/pip/_internal/commands/__init__.py", line 6, in <module>
    from pip._internal.commands.completion import CompletionCommand
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/pip/_internal/commands/completion.py", line 6, in <module>
    from pip._internal.cli.base_command import Command
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/pip/_internal/cli/base_command.py", line 19, in <module>
    from pip._internal.download import PipSession
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/pip/_internal/download.py", line 15, in <module>
    from pip._vendor import requests, six, urllib3
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/pip/_vendor/requests/__init__.py", line 97, in <module>
    from pip._vendor.urllib3.contrib import pyopenssl
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/pip/_vendor/urllib3/contrib/pyopenssl.py", line 46, in <module>
    import OpenSSL.SSL
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import rand, crypto, SSL
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/OpenSSL/crypto.py", line 13, in <module>
    from cryptography.hazmat.primitives.asymmetric import dsa, rsa
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/cryptography/hazmat/primitives/asymmetric/rsa.py", line 14, in <module>
    from cryptography.hazmat.backends.interfaces import RSABackend
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/cryptography/hazmat/backends/__init__.py", line 7, in <module>
    import pkg_resources
  File "/home/bakhytgul/anaconda3/lib/python3.6/site-packages/pkg_resources.py", line 1435, in <module>
    register_loader_type(importlib_bootstrap.SourceFileLoader, DefaultProvider)
AttributeError: module 'importlib._bootstrap' has no attribute 'SourceFileLoader'

你能帮我解决这个问题吗？十分感谢。我使用： - Ubuntu 16.04。（64 位）- Python 2.7.12 - Python 3.6.0 :: Anaconda 4.3.1（64 位）

PS：我尝试使用 dotenv、ensurepip 进行修复（这让我回答说我没有这个包）。

Answer 1

这不是完整的答案，因为我无法告诉您为什么会发生这种情况，但希望这能帮助您找到解决方案。

我在使用 venv 时遇到了这个问题。当我从头开始尝试构建 rjsmin 时，一切都很顺利，就在那时我注意到原因是失败的 venv 使用的是 Python 3.6，而新的 venv 使用的是 Python 3.7。

根据您的控制台输出，您拥有的 anaconda 使用的是 3.6，我认为您可能通过使用 pip 手动升级软件包来破坏安装。您可以尝试获取较新版本的 anaconda，或者进行全新安装。