No constructor defined for ValidationError

[saber-solooki]

Initial Checks

• I confirm that I'm using Pydantic V2

Description

I'm trying to mimic some behavior on my test and when I try to create an object of ValidationError, I'll get an error:

TypeError: No constructor defined

This is not an issue in version one.
As I checked ValidationError is inherited from ValueError which is Exception. In my understanding, it makes sense to create an object of the Exception class.

Example Code

from pydantic import ValidationError
ValidationError()

TypeError: No constructor defined

Python, Pydantic & OS Version

pydantic version: 2.4.2
        pydantic-core version: 2.10.1
          pydantic-core build: profile=release pgo=false
                 install path: /Users/sabersolooki/.pyenv/versions/3.10.6/envs/myproject/lib/python3.10/site-packages/pydantic
               python version: 3.10.6 (main, Nov 25 2022, 12:24:25) [Clang 13.1.6 (clang-1316.0.21.2.5)]
                     platform: macOS-12.4-x86_64-i386-64bit
             related packages: mypy-1.6.1 typing_extensions-4.8.0 email-validator-2.1.0.post1

[sydney-runkle]

Hi @saber-solooki,

Thanks for your question. As answered in this issue: #6734, you'll have to use ValidationError.from_exception_data.

You can read more in the docs here: https://docs.pydantic.dev/latest/api/pydantic_core/#pydantic_core._pydantic_core.ValidationError.from_exception_data