Error while importing strawberry-graphql library

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Summary

The issue encountered is an incompatibility between the installed strawberry-graphql library and the pydantic library. The error message indicates that strawberry-graphql is trying to import from pydantic.v1.utils, but the installed version of pydantic is 2.5.3.

Root Cause

The root cause of the issue is:

  • Incompatible library versions: The installed version of pydantic is 2.5.3, but strawberry-graphql is trying to import from pydantic.v1.utils.
  • Removed function: The lenient_issubclass function has been removed from pydantic.utils in version 2.x.

Why This Happens in Real Systems

This issue can occur in real systems due to:

  • Dependency conflicts: When different libraries have conflicting dependencies, it can lead to version incompatibilities.
  • Outdated libraries: Using outdated libraries can cause issues when newer versions of dependencies are installed.
  • Incorrect imports: Incorrect imports, such as importing from a specific version of a library, can cause issues when the installed version is different.

Real-World Impact

The real-world impact of this issue includes:

  • Application crashes: The application may crash or fail to start due to the import error.
  • Development delays: Resolving the issue can cause delays in development and deployment.
  • Security vulnerabilities: Using outdated libraries can expose the application to security vulnerabilities.

Example or Code (if necessary and relevant)

import pydantic
print(pydantic.__version__)

import strawberry

This code will raise an error due to the incompatibility between strawberry-graphql and pydantic.

How Senior Engineers Fix It

Senior engineers can fix this issue by:

  • Checking library versions: Verify the versions of strawberry-graphql and pydantic to ensure they are compatible.
  • Updating libraries: Update strawberry-graphql to a version that is compatible with pydantic 2.x.
  • Using version-specific imports: Use version-specific imports, such as importing from pydantic.v2.utils, to ensure compatibility.

Why Juniors Miss It

Junior engineers may miss this issue due to:

  • Lack of experience: Limited experience with dependency management and version conflicts.
  • Insufficient testing: Inadequate testing of library versions and compatibility.
  • Poor understanding of imports: Limited understanding of how imports work and how to handle version-specific imports.