在datalab中导入gcsfs时出现错误

Question

当我在datalab中导入gcsfs时，

import gcsfs

我有一个与包fsspec相关的无效语法错误。这与版本有关吗？

  File "/usr/local/envs/py3env/lib/python3.5/site-packages/IPython/core/interactiveshell.py", line 2961, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)

  File "<ipython-input-3-3f25f74e3f1b>", line 1, in <module>
    import gcsfs

  File "/usr/local/envs/py3env/lib/python3.5/site-packages/gcsfs/__init__.py", line 5, in <module>
    from .core import GCSFileSystem

  File "/usr/local/envs/py3env/lib/python3.5/site-packages/gcsfs/core.py", line 7, in <module>
    import fsspec

  File "/usr/local/envs/py3env/lib/python3.5/site-packages/fsspec/__init__.py", line 10, in <module>
    from .mapping import FSMap, get_mapper

  File "/usr/local/envs/py3env/lib/python3.5/site-packages/fsspec/mapping.py", line 2, in <module>
    from .core import url_to_fs

  File "/usr/local/envs/py3env/lib/python3.5/site-packages/fsspec/core.py", line 314
    out[0] = (f"{out[0][1]}://", out[0][1], out[0][2])
                              ^
SyntaxError: invalid syntax

Answer 1

为了扩展Claros的答案，潜在的问题是fsspec包，gcsfs继承了这个包。fsspec的最新0.8.0版本实现了f字符串，这是导致该错误的原因。要修复它，只需安装仍然支持Python3.5的最新fsspec版本，即

!pip install fsspec==0.6.2

https://pypi.org/project/fsspec/0.6.2/

您可能还必须降级gcsfs。我得到了它的工作

!pip install  --upgrade gcsfs==0.5.3

Answer 2

您使用的是Python3.5，而f字符串是Python3.6中实现的特性。您可以找到与Python3.5兼容的软件包版本，也可以升级到Python 3.6+。