configparser.MissingSectionHeaderError: File contains no section headers.

[yejue]

I encountered a very strange problem. I just used the following code to import pydantic_settings.

from pydantic_settings import BaseSettings
print("hello world")

But the following error was displayed:

root@ubuntu:~/projects/SightlessGuide2# python test.py 
Traceback (most recent call last):
  File "test.py", line 1, in <module>
    from pydantic_settings import BaseSettings
  File "/usr/local/lib/python3.8/dist-packages/pydantic_settings/__init__.py", line 1, in <module>
    from .main import BaseSettings, CliApp, SettingsConfigDict
  File "/usr/local/lib/python3.8/dist-packages/pydantic_settings/main.py", line 14, in <module>
    from .sources import (
  File "/usr/local/lib/python3.8/dist-packages/pydantic_settings/sources.py", line 40, in <module>
    from pydantic import AliasChoices, AliasPath, BaseModel, Json, RootModel, TypeAdapter
  File "<frozen importlib._bootstrap>", line 1039, in _handle_fromlist
  File "/usr/local/lib/python3.8/dist-packages/pydantic/__init__.py", line 421, in __getattr__
    module = import_module(module_name, package=package)
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/usr/local/lib/python3.8/dist-packages/pydantic/root_model.py", line 35, in <module>
    class RootModel(BaseModel, typing.Generic[RootModelRootType], metaclass=_RootModelMetaclass):
  File "/usr/local/lib/python3.8/dist-packages/pydantic/_internal/_model_construction.py", line 224, in __new__
    complete_model_class(
  File "/usr/local/lib/python3.8/dist-packages/pydantic/_internal/_model_construction.py", line 620, in complete_model_class
    cls.__pydantic_validator__ = create_schema_validator(
  File "/usr/local/lib/python3.8/dist-packages/pydantic/plugin/_schema_validator.py", line 38, in create_schema_validator
    plugins = get_plugins()
  File "/usr/local/lib/python3.8/dist-packages/pydantic/plugin/_loader.py", line 39, in get_plugins
    for entry_point in dist.entry_points:
  File "/usr/lib/python3.8/importlib/metadata.py", line 240, in entry_points
    return EntryPoint._from_text(self.read_text('entry_points.txt'))
  File "/usr/lib/python3.8/importlib/metadata.py", line 100, in _from_text
    config.read_string(text)
  File "/usr/lib/python3.8/configparser.py", line 723, in read_string
    self.read_file(sfile, source)
  File "/usr/lib/python3.8/configparser.py", line 718, in read_file
    self._read(f, source)
  File "/usr/lib/python3.8/configparser.py", line 1082, in _read
    raise MissingSectionHeaderError(fpname, lineno, line)
configparser.MissingSectionHeaderError: File contains no section headers.

I wanted to look from the bottom to find out which f caused it and what it was. when I added print and reran it, the code was correct.

[yejue]

My System Info:

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.6 LTS"

My Package Info:

pydantic               2.10.5              
pydantic-core          2.27.2              
pydantic-settings      2.6.1   

[hramezani]

I couldn't reproduce the problem. can you try it in a fresh env?

[yejue]

I realized that I also made a mistake in the above code. I tried to directly print f.name, which might have caused an AttributeError. As a result, the code skipped from this position. Then, somewhere, this error was caught, so the code could run. So, I did the following operation in _read and directly threw an error.

I found that, just as I thought, there was a place in metadata.py that caught this error.

[yejue]

I couldn't reproduce the problem. can you try it in a fresh env?

Yes, there seem to be some strange issues with my environment. When I tried to create a new environment using virtualenv, it showed me an AttributeError.

root@ubuntu:~/pythonenvs# virtualenv testenv
22222222222222222222222222
AttributeError: '_io.StringIO' object has no attribute 'name'

By the way, this is one of my devices with the ARM architecture. I've never encountered related problems on other devices.

[hramezani]

I am not sure what the source of the problem is.

let's close the problem. but feel free to reopen it when you have more information about the problem.