FIXES_APPLIED.md

Fix for KeyError: 'success' in Risk Discovery Comparison

Problems Fixed

Issue 1: NMF Parameter Error ✅

Error: TypeError: NMF.__init__() got an unexpected keyword argument 'alpha' Fixed in: risk_discovery_alternatives.py

Issue 2: KeyError 'method' ✅

Error: KeyError: 'method' when comparing methods Fixed in: risk_discovery.py - Added consistent return format

Issue 3: KeyError 'success' ✅

Error: KeyError: 'success' in generate_comparison_report Fixed in: compare_risk_discovery.py - Updated to handle direct results format

Root Cause Analysis

The comparison pipeline had evolved to use a unified compare_risk_discovery_methods() function that returns:

{
    'summary': {...},
    'detailed_results': {
        'kmeans': {'method': '...', 'n_clusters': 7, ...},
        'lda': {'method': '...', 'n_topics': 7, ...},
        ...
    }
}

But generate_comparison_report() was still expecting the OLD format from compare_single_method():

{
    'kmeans': {
        'success': True,
        'results': {'method': '...', ...},
        'execution_time': 42.5
    }
}

Solution

Updated generate_comparison_report() to work directly with method results without the wrapper:

Before:

for method_name, result in all_results.items():
    if result['success']:                    # ❌ KeyError!
        res = result['results']              # ❌ KeyError!
        n_patterns = res.get('n_clusters')

After:

for method_name, result in all_results.items():
    n_patterns = result.get('n_clusters') or result.get('n_topics')  # ✅ Direct access
    quality_metrics = result.get('quality_metrics', {})               # ✅ Direct access

Changes Made

File: compare_risk_discovery.py

1. Summary Table Generation (lines ~245-260)

   • Removed result['success'] check
   • Access results directly without result['results'] wrapper
   • Removed execution time column (not tracked in unified comparison)

2. Detailed Analysis (lines ~270-330)

   • Removed if not result['success'] error handling
   • Changed all res.get(...) to result.get(...)
   • Fixed pattern display for all three formats
   • Removed duplicate code sections

Testing