ERROR: unexpected error - 'NoneType' object has no attribute 'flush'

[pallavi176]

Bug Report

Reproduce

Expected

Environment information

Output of dvc doctor:

$ dvc doctor

Additional Information (if any):

[karajan1001]

Excuse me , could you please provide some more details?
the output of dvc doctor -vv and which version what platform are you on.

[pallavi176]

$ dvc doctor -vv
2022-03-16 09:46:31,907 TRACE: Namespace(cd='.', cmd='doctor', cprofile=False, cprofile_dump=None, func=<class 'dvc.commands.version.CmdVersion'>, instrument=False, instrument_open=False, pdb=False, quiet=0, verbose=2, version=None, viztracer=False, viztracer_depth=None, yappi=False)
DVC version: 2.9.5 (pip)

Platform: Python 3.7.11 on Windows-10-10.0.19041-SP0
Supports:
webhdfs (fsspec = 2022.2.0),
http (aiohttp = 3.8.1, aiohttp-retry = 2.4.5),
https (aiohttp = 3.8.1, aiohttp-retry = 2.4.5)
Cache types: https://error.dvc.org/no-dvc-cache
Caches: local
Remotes: None
Workspace directory: NTFS on C:
Repo: dvc, git
2022-03-16 09:46:36,193 DEBUG: Check for update is enabled.
2022-03-16 09:46:36,399 DEBUG: Trying to spawn '['daemon', '-q', 'updater']'
2022-03-16 09:46:36,451 DEBUG: Spawned '['daemon', '-q', 'updater']'
2022-03-16 09:46:36,470 DEBUG: Analytics is enabled.
2022-03-16 09:46:36,493 DEBUG: Trying to spawn '['daemon', '-q', 'analytics', 'C:\Users\PALLAV1.SAX\AppData\Local\Temp\tmpetdp7fj6']'
2022-03-16 09:46:36,573 DEBUG: Spawned '['daemon', '-q', 'analytics', 'C:\Users\PALLAV1.SAX\AppData\Local\Temp\tmpetdp7fj6']'

==============================================================

$ dvc --version
2.9.5

==============================================================

Platform:
Windows 10
VSCode
Terminal GitBash
Conda environment

[pallavi176]

History of commands I executed on VSCode Terminal GitBash:
conda create -n basic_demo python=3.7 -y
conda activate basic_demo
pip install dvc
touch stage_01.py stage_02.py
python stage_01.py
python stage_02.py
git init
dvc init
touch dvc.yaml
dvc repro

=======================================================
The code I was working on is available at below link:
https://github.com/pallavi176/AIops_dvc.git

[dtrifiro]

Hey @pallavi176, could you try using WSL?

Related issue: https://discuss.dvc.org/t/error-unexpected-error-nonetype-object-has-no-attribute-flush/1031/7

It's likely due to tqdm, leaving these two PRs for reference
tqdm/tqdm#1248
tqdm/tqdm#1249

[pallavi176]

What is WSL? How can I use it?

[dtrifiro]

https://en.wikipedia.org/wiki/Windows_Subsystem_for_Linux
https://docs.microsoft.com/en-us/windows/wsl/about

You can find some infomration on how to install it here: https://docs.microsoft.com/en-us/windows/wsl/install

[pallavi176]

Thanks, I will try. But why can't I use dvc on windows?

[dtrifiro]

It's related to the linked issue with the tqdm module, used by dvc to provide progress bar, which seems broken in gitbash. While we wait for the issue to be fixed upstream, the alternative is using WSL.

A workaround which does not involve using WSL would be trying to run dvc with the --quiet/-q flag. This will not print any output, but the command should complete succesfully.

[pallavi176]

Thanks a lot

[casperdcl]

Should be fixed now by tqdm/tqdm#1248 but opened a follow-up PR #7503 just in case :)