Question

我正在使用virtualenvwrapper。在我使用Python3的virtualenv下，我成功安装了futures，然后如果我安装了其他任何东西，它将弹出来自futures软件包的语法错误错误如下：

$ pip install futures
Collecting futures
Installing collected packages: futures
Successfully installed futures-3.1.1
$ pip install sklearn
Traceback (most recent call last):
  File "/data/analytics/yliu/.virtualenvs/alice1/bin/pip", line 7, in <module>
    from pip._internal import main
  File "/data/analytics/yliu/.virtualenvs/alice1/lib/python3.6/site-packages/pip/_internal/__init__.py", line 40, in <module>
    from pip._internal.cli.autocompletion import autocomplete
  File "/data/analytics/yliu/.virtualenvs/alice1/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 "/data/analytics/yliu/.virtualenvs/alice1/lib/python3.6/site-packages/pip/_internal/cli/main_parser.py", line 12, in <module>
    from pip._internal.commands import (
  File "/data/analytics/yliu/.virtualenvs/alice1/lib/python3.6/site-packages/pip/_internal/commands/__init__.py", line 6, in <module>
    from pip._internal.commands.completion import CompletionCommand
  File "/data/analytics/yliu/.virtualenvs/alice1/lib/python3.6/site-packages/pip/_internal/commands/completion.py", line 6, in <module>
    from pip._internal.cli.base_command import Command
  File "/data/analytics/yliu/.virtualenvs/alice1/lib/python3.6/site-packages/pip/_internal/cli/base_command.py", line 24, in <module>
    from pip._internal.index import PackageFinder
  File "/data/analytics/yliu/.virtualenvs/alice1/lib/python3.6/site-packages/pip/_internal/index.py", line 41, in <module>
    from pip._internal.wheel import Wheel
  File "/data/analytics/yliu/.virtualenvs/alice1/lib/python3.6/site-packages/pip/_internal/wheel.py", line 7, in <module>
    import compileall
  File "/usr/local/anaconda3/anaconda/lib/python3.6/compileall.py", line 20, in <module>
    from concurrent.futures import ProcessPoolExecutor
  File "/data/analytics/yliu/.virtualenvs/alice1/lib/python3.6/site-packages/concurrent/futures/__init__.py", line 8, in <module>
    from concurrent.futures._base import (FIRST_COMPLETED,
  File "/data/analytics/yliu/.virtualenvs/alice1/lib/python3.6/site-packages/concurrent/futures/_base.py", line 381
    raise exception_type, self._exception, self._traceback
                        ^
SyntaxError: invalid syntax

我检查了以下问题的答案：pip install error within Python 3 virtualenv，但这对我不起作用。 futures软件包确实安装在正确版本的python 3.6.5中。

我尝试在python3.6上全局安装Future，并且一切正常。因此futures和virtualenv似乎有些问题。

有人可以帮我解决这个问题吗？

非常感谢

Answer 1

futures package at PyPI是concurrent.futures标准库模块向Python 2的反向移植。

要在Python 3中使用futures，您无需安装任何程序，它是一个标准的库模块。

现在您的virtualenv包含一个损坏的Python 2模块。我建议删除virtualenv并重新创建它。

在我的virtualenv中安装Futures软件包后出现语法错误

1 个答案: