`dvc exp show --json` produces error that disables VS Code Extension from tracking experiments

[TeamEpimicro]

Bug Report

dvc exp show --json : ERROR: unexpected error - first argument must be callable or None

Description

I am currently using the VS Code extension with version v0.9.6 and dvc with version v2.58.2 (see dvc doctor output below). My .dvc/config file is the following:

[core]
    analytics = false
    remote = local
[cache]
    type = "reflink,hardlink,copy"
['remote "local"']
    url = some/local/url

My VS Code Extension is showing "No experiment to display" in the Experiments tab of the left sidebar. In addition, the Experiment tab in the Setup view of the DVC extension says: "Your project contains no data"

As a result, I am unable to use the VS Code Extension.

However I already ran of couple of experiments through dvc exp run and pushed the associated dvc.lock files to my git repo, which I can successfully track through the CLI with dvc exp show --rev master :

$ dvc exp show --rev master
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| Experiment | Created | models\model_dvc_v1.5.0\rfor\eval\live\metrics.json:avg_precision.train | models\model_dvc_v1.5.0\rfor\eval\live\metrics.json:avg_precision.test | models\model_dvc_v1.5.0\rfor\eval\live\metrics.json:roc_auc.train | models\model_dvc_v1.5.0\rfor\eval\live\metrics.json:roc_auc.test | models\model_dvc_v1.5.0\rfor\eval\live\metrics.json:true_positive_rate.tr
|------------+---------+-------------------------------------------------------------------------+------------------------------------------------------------------------+-------------------------------------------------------------------+------------------------------------------------------------------+--------------------------------------------------------------------------
| workspace  | -       |                                                                       1 |                                                                      1 |                                                                 0 |                                                                0 |
| master     | -       |                                                                       - |                                                                      - |                                                                 - |                                                                - |
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

I found an error in the VS Code Developper Console :

exp show --rev master -n 3 --json failed with ERROR: unexpected error - first argument must be callable or None

The same error is displayed when running dvc exp show --json in the CLI :

$ dvc exp show --json
ERROR: unexpected error - first argument must be callable or None

Here is the same command ran with --verbose :

$ dvc exp show --json --verbose
2023-06-08 14:12:00,455 DEBUG: v2.58.2 (pip), CPython 3.9.10 on Windows-10-10.0.19044-SP0
2023-06-08 14:12:00,455 DEBUG: command: C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\Scripts\dvc exp show --json --verbose
2023-06-08 14:12:02,121 DEBUG: Removing 'C:\Users\user\Documents\Projets\priam\.dvc\tmp\exps\cache\23\f69486c525c1fc2e124f1204e8e2308a4ecb70'
2023-06-08 14:12:02,121 DEBUG: first argument must be callable or None
Traceback (most recent call last):
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\repo\experiments\collect.py", line 71, in collect_rev
    cache.put(data, force=True)
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\repo\experiments\cache.py", line 47, in put
    self.odb.add_bytes(rev, exp.as_bytes())
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\repo\experiments\serialize.py", line 111, in as_bytes
    return _ISOEncoder().encode(self.dumpd()).encode("utf-8")
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\repo\experiments\serialize.py", line 108, in dumpd
    return asdict(self)
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1075, in asdict
    return _asdict_inner(obj, dict_factory)
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1082, in _asdict_inner
    value = _asdict_inner(getattr(obj, f.name), dict_factory)
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1112, in _asdict_inner
    return type(obj)((_asdict_inner(k, dict_factory),
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1113, in <genexpr>
    _asdict_inner(v, dict_factory))
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1112, in _asdict_inner
    return type(obj)((_asdict_inner(k, dict_factory),
TypeError: first argument must be callable or None

2023-06-08 14:12:02,393 DEBUG: Removing 'C:\Users\user\Documents\Projets\priam\.dvc\tmp\exps\cache\41\09bc516df665602e670e50fdcf15cc4fcc698c'
2023-06-08 14:12:02,401 DEBUG: first argument must be callable or None
Traceback (most recent call last):
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\repo\experiments\collect.py", line 71, in collect_rev
    cache.put(data, force=True)
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\repo\experiments\cache.py", line 47, in put
    self.odb.add_bytes(rev, exp.as_bytes())
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\repo\experiments\serialize.py", line 111, in as_bytes
    return _ISOEncoder().encode(self.dumpd()).encode("utf-8")
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\repo\experiments\serialize.py", line 108, in dumpd
    return asdict(self)
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1075, in asdict
    return _asdict_inner(obj, dict_factory)
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1082, in _asdict_inner
    value = _asdict_inner(getattr(obj, f.name), dict_factory)
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1112, in _asdict_inner
    return type(obj)((_asdict_inner(k, dict_factory),
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1113, in <genexpr>
    _asdict_inner(v, dict_factory))
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1112, in _asdict_inner
    return type(obj)((_asdict_inner(k, dict_factory),
TypeError: first argument must be callable or None

2023-06-08 14:12:02,403 ERROR: unexpected error - first argument must be callable or None
Traceback (most recent call last):
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\cli\__init__.py", line 210, in main
    ret = cmd.do_run()
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\cli\command.py", line 26, in do_run
    return self.run()
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\commands\experiments\show.py", line 197, in run
    ui.write_json([exp.dumpd() for exp in exps], default=_format_json)
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\commands\experiments\show.py", line 197, in <listcomp>
    ui.write_json([exp.dumpd() for exp in exps], default=_format_json)
  File "C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\lib\site-packages\dvc\repo\experiments\serialize.py", line 184, in dumpd
    return asdict(self)
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1075, in asdict
    return _asdict_inner(obj, dict_factory)
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1082, in _asdict_inner
    value = _asdict_inner(getattr(obj, f.name), dict_factory)
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1082, in _asdict_inner
    value = _asdict_inner(getattr(obj, f.name), dict_factory)
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1112, in _asdict_inner
    return type(obj)((_asdict_inner(k, dict_factory),
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1113, in <genexpr>
    _asdict_inner(v, dict_factory))
  File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\dataclasses.py", line 1112, in _asdict_inner
    return type(obj)((_asdict_inner(k, dict_factory),
TypeError: first argument must be callable or None

2023-06-08 14:12:02,463 DEBUG: link type reflink is not available ([Errno 129] no more link types left to try out)
2023-06-08 14:12:02,463 DEBUG: Removing 'C:\Users\user\Documents\Projets\.CKkgodSpGJHLcb7YVCcjuL.tmp'
2023-06-08 14:12:02,463 DEBUG: Removing 'C:\Users\user\Documents\Projets\.CKkgodSpGJHLcb7YVCcjuL.tmp'
2023-06-08 14:12:02,463 DEBUG: link type symlink is not available ([WinError 1314] Le client ne dispose pas d▒un privil▒ge n▒cessaire: 'C:/Users/user/Documents/Projets/priam/.dvc/cache/.KPmWaZQ8W9QmaDqNSqcJAa.tmp' -> 'C:/Users/user/Documents/Projets/.CKkgodSpGJHLcb7YVCcjuL.tmp')
2023-06-08 14:12:02,463 DEBUG: Removing 'C:\Users\user\Documents\Projets\.CKkgodSpGJHLcb7YVCcjuL.tmp'
2023-06-08 14:12:02,463 DEBUG: Removing 'C:\Users\user\Documents\Projets\priam\.dvc\cache\.KPmWaZQ8W9QmaDqNSqcJAa.tmp'
2023-06-08 14:12:02,463 DEBUG: Version info for developers:
DVC version: 2.58.2 (pip)
-------------------------
Platform: Python 3.9.10 on Windows-10-10.0.19044-SP0
Subprojects:
        dvc_data = 0.51.0
        dvc_objects = 0.22.0
        dvc_render = 0.5.3
        dvc_task = 0.2.1
        scmrepo = 1.0.3
Supports:
        http (aiohttp = 3.8.4, aiohttp-retry = 2.8.3),
        https (aiohttp = 3.8.4, aiohttp-retry = 2.8.3)
Config:
        Global: C:\Users\user\AppData\Local\iterative\dvc
        System: C:\ProgramData\iterative\dvc
Cache types: hardlink
Cache directory: NTFS on C:\
Caches: local
Remotes: local
Workspace directory: NTFS on C:\
Repo: dvc, git
Repo.site_cache_dir: C:\ProgramData\iterative\dvc\Cache\repo\dd38c746d16228f621190e9e46db919d

Having any troubles? Hit us up at https://dvc.org/support, we are always happy to help!
2023-06-08 14:12:02,472 DEBUG: Analytics is disabled.

Reproduce

0. git init
1. dvc init
2. dvc exp run
3. dvc push
4. git add dvc.lock
5. git commit -m "some commit name"
6. git push
7. dvc exp show --json

Expected

No error is expected.

Environment information

Output of dvc doctor:

$ dvc doctor
DVC version: 2.58.2 (pip)
-------------------------
Platform: Python 3.9.10 on Windows-10-10.0.19044-SP0
Subprojects:
        dvc_data = 0.51.0
        dvc_objects = 0.22.0
        dvc_render = 0.5.3
        dvc_task = 0.2.1
        scmrepo = 1.0.3
Supports:
        http (aiohttp = 3.8.4, aiohttp-retry = 2.8.3),
        https (aiohttp = 3.8.4, aiohttp-retry = 2.8.3)
Config:
        Global: C:\Users\user\AppData\Local\iterative\dvc
        System: C:\ProgramData\iterative\dvc
Cache types: hardlink
Cache directory: NTFS on C:\
Caches: local
Remotes: local
Workspace directory: NTFS on C:\
Repo: dvc, git
Repo.site_cache_dir: C:\ProgramData\iterative\dvc\Cache\repo\dd38c746d16228f621190e9e46db919d

I am using poetry for package and environment management.

Output of pip check:

$ pip check
No broken requirements found.

Output of poetry check:

$ poetry check
All set!

Output of poetry env info:

$ poetry env info

Virtualenv
Python:         3.9.10
Implementation: CPython
Path:           C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9
Executable:     C:\Users\user\AppData\Local\pypoetry\Cache\virtualenvs\priam-xwE_6ZV3-py3.9\Scripts\python.exe
Valid:          True

System
Platform:   win32
OS:         nt
Python:     3.9.10
Path:       C:\Users\user\AppData\Local\Programs\Python\Python39
Executable: C:\Users\user\AppData\Local\Programs\Python\Python39\python.exe

Output of poetry show dvc:

$ poetry show dvc
 name         : dvc
 version      : 2.58.2
 description  : Git for data scientists - manage your code and data together

dependencies
 - colorama >=0.3.9
 - configobj >=5.0.6
 - distro >=1.3
 - dpath >=2.1.0,<3
 - dvc-data >=0.51.0,<0.52
 - dvc-http >=2.29.0
 - dvc-render >=0.3.1,<1
 - dvc-studio-client >=0.9.2,<1
 - dvc-task >=0.2.1,<1
 - flatten-dict >=0.4.1,<1
 - flufl.lock >=5
 - funcy >=1.14
 - grandalf >=0.7,<1
 - hydra-core >=1.1
 - iterative-telemetry >=0.0.7
 - networkx >=2.5
 - packaging >=19
 - pathspec >=0.10.3
 - platformdirs >=3.1.1,<4
 - psutil >=5.8
 - pydot >=1.2.4
 - pygtrie >=2.3.2
 - pyparsing >=2.4.7
 - requests >=2.22
 - rich >=12
 - ruamel.yaml >=0.17.11
 - scmrepo >=1.0.0,<2
 - shortuuid >=0.5
 - shtab >=1.3.4,<2
 - tabulate >=0.8.7
 - tomlkit >=0.11.1
 - tqdm >=4.63.1,<5
 - voluptuous >=0.11.7
 - zc.lockfile >=1.2.1

required by
 - dvclive >=2.58.0,<3

Additionnal Information

I am instantiating dvclive in my code with the following :

with Live(dvc_live_path, report=None, dvcyaml=False) as live:

And tracking some metrics with both live.summary() and live.log_metric():

for metric in all_metrics:
    if not live.summary.get(metric):
        live.summary[metric] = {}
        live.summary[metric][split] = {}
    curr_metric = all_metrics[metric]
    live.summary[metric][split] = curr_metric['value']
    live.log_metric(f'{metric}/{split}', curr_metric['value'])

[pmrowla]

This is actually a core python bug which has been fixed in some releases but has not been backported to a 3.9 release yet.

We have a workaround for it here: https://github.com/iterative/dvc/blob/ed664143b48f5372773075ad5093b93ffdfd755b/dvc/repo/experiments/serialize.py#L59-L71

but I'm guessing this issue means we need to make the defaultdict->dict conversion recursive

[Danila89]

I'm facing the same issue, it happens even with python 3.10. Are there any workarounds at the moment?

[dberenbaum]

@pmrowla Is it expected that it would still happen with 3.10?

[shcheklein]

@Danila89 hey, could you please also share a bit more information - dvc version output, logs, etc. Thanks.

[Danila89]

@shcheklein seems that the problem depends on what exactly the experiments look like. I'm exploring DVC capabilities, I delete and run a lot of experiments. At some point in time I encountered the issue. Vscode extension did not work, dvc exp show --json failed with both Python 3.10.9 and Python 3.9.6. I reproduced it with dvc 2.58.2 and dvc 3.0.0. But at the moment (I guess after deletion of some experiments) the problem is gone. If I will encounter it next time I will share the details and try to find the way to reproduce.

[dberenbaum]

@mattseddon reported that he can reproduce it with python 3.10 in https://github.com/iterative/dvc/issues/9588#issuecomment-1594504602. Looking into it.

Update: looks like a regression from https://github.com/iterative/dvc/commit/ec090c5680c490f34339edf3beaf9b40a90397a9.

[skshetry]

@pmrowla Is it expected that it would still happen with 3.10?

This will happen in Python <3.12.

[dberenbaum]

@skshetry I think it's actually Python<3.11.0, right?

[dberenbaum]

AFAICT the default dicts are only nested one level deep, so I put a quick fix PR in https://github.com/iterative/dvc/pull/9619. @skshetry @pmrowla Any issues with this quick fix?

@TeamEpimicro If you want to try, you could do pip install git+https://github.com/iterative/dvc.git@exp-serialize-defaultdict and check if it fixes the problem.

[skshetry]

@skshetry I think it's actually Python<3.11.0, right?

No, it was fixed only in 3.12. See https://github.com/python/cpython/pull/32056.

i can still repro in 3.11 using:

from collections import defaultdict
from dataclasses import asdict, dataclass, field

@dataclass
class Klass:
    d: dict[str, list[int]] = field(default_factory=dict)

d = defaultdict(list, {"lst": [1, 2, 3]})
inst = Klass(d=d)
print(asdict(inst))

[dberenbaum]

Closing as fixed by #9619.

@TeamEpimicro @Danila89 Please follow up if you still have issues.