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Improve AttributeError message in XmlLayer when accessing missing fields #735

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Improve AttributeError message in XmlLayer when accessing missing fields #735

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@rshayer95 rshayer95 commented May 13, 2025

Summary

This PR improves the AttributeError raised in XmlLayer.__getattr__ when accessing a non-existent field.

Instead of a generic exception, the updated message includes:

  • The name of the missing field
  • The current layer name
  • A list of available field names in that layer

This enhancement improves the developer experience by making debugging much easier when interacting with parsed packet data.

File Changed

  • pyshark/src/pyshark/packet/layers/xml_layer.py

Line 79 Modified

  • Changed from: 
    raise AttributeError()
  • Changed to: 
    raise AttributeError(f"Field '{item}' not found in layer '{self.layer_name}'. Available fields: {', '.join(self.field_names)}")
fix(xml_layer): add descriptive message to AttributeError for missing…
4c051e2 
… fields Raises AttributeError with a helpful message when accessing a non-existent field in XmlLayer. The message includes the field name, layer name, and available fields. Fixes KimiNewt#733
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