Fix/57 Ignore attributes with special characters

[Sachinbisht27]

#57

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Types of changes

• Bug fix (a change which fixes an issue)
• New feature (a change which adds functionality)

Short description of what this resolves:

The changes are required to ignore the field keys containing special characters other than underscore _.

Checklist:

• I have performed a self-review of my own code.
• The code follows the style guidelines of this project.
• The code changes are passing the CI checks
• I have documented my code wherever required.
• The changes requires a change to the documentation.
• I have updated the documentation based on the my changes.
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.