'S3File' object has no attribute 'forced'

[digital-idiot]

Getting the following error when trying to create and write to a file:

Related Original Issue: Toblerity/Fiona#1476 (comment)

Exception ignored in: <function AbstractBufferedFile.__del__ at 0x10788b560>
Traceback (most recent call last):
  File "~/.micromamba/envs/PyDev/lib/python3.12/site-packages/fsspec/spec.py", line 2216, in __del__
    self.close()
  File "~/.micromamba/envs/PyDev/lib/python3.12/site-packages/fsspec/spec.py", line 2177, in close
    if not self.forced:
           ^^^^^^^^^^^
AttributeError: 'S3File' object has no attribute 'forced'

---

fsspec.__version__
Out: '2024.12.0'

s3fs.__version__
Out: '2024.12.0'

EDIT

Turns out fiona is using 'wb+' file mode which does not seem to be supported by 'S3File' object.

[martindurant]

Turns out fiona is using 'wb+' file mode which does not seem to be supported by 'S3File' object.

Would you be willing to provide a PR to raise an appropriate exception for this case? Seeking and writing inplace for remote files is not generally possible, uploads are always essentially streamed.

[digital-idiot]

Would you be willing to provide a PR

Yes. I will try to submit a PR in the coming weekend. Hopefully, I will be able to triag how fiona instantiating the fsspec.AbstractBufferedFile object with wb+ mode in the first place. Because according to the following, direct instantiation ought to throw exception.

https://github.com/fsspec/filesystem_spec/blob/1d34249f0b043907f86064c274a33454ec670ebe/fsspec/spec.py#L1878-L1879

[martindurant]

direct instantiation ought to throw exception

indeed

[digital-idiot]

Closing this for now, doesn't seem like a fsspec/s3fs issue exactly.

• Relevant disussion: Newly added opener argument and subsequent behavior Toblerity/Fiona#1479