fixing DQ issues

utils/data_processing.py

@@ -1,4 +1,12 @@
 # utils/data_processing.py
+"""Data processing utilities for GTIN validation and price parsing.
+
+This module provides classes and functions for:
+- GTIN (Global Trade Item Number) validation and normalization
+- Price parsing with currency detection
+- Data cleaning and validation utilities
+"""
+
 import logging
 import re
 from typing import Optional, Tuple
@@ -9,14 +17,15 @@ logger = logging.getLogger(__name__)
 
 
 class GTINProcessor:
-    """Handles GTIN normalization and validation"""
+    """Handles GTIN normalization and validation."""
 
     VALID_LENGTHS = [8, 12, 13, 14]
 
     def normalize(self, gtin_value: any) -> Optional[str]:
         """
-        Normalize GTIN to proper format
-        Returns None for invalid GTINs
+        Normalize GTIN to proper format.
+
+        Returns None for invalid GTINs.
         """
         if not gtin_value or pd.isna(gtin_value):
             return None
@@ -63,14 +72,14 @@ class GTINProcessor:
         return None
 
     def validate(self, gtin: str) -> bool:
-        """Validate GTIN format"""
+        """Validate GTIN format."""
         if not gtin:
             return False
         return len(gtin) in self.VALID_LENGTHS and gtin.isdigit()
 
 
 class PriceProcessor:
-    """Handles price parsing and currency extraction"""
+    """Handles price parsing and currency extraction."""
 
     CURRENCY_PATTERNS = {
         # Amount followed by currency
@@ -92,7 +101,8 @@ class PriceProcessor:
         self, price_str: any
     ) -> Tuple[Optional[str], Optional[str]]:
         """
-        Parse price string into (price, currency) tuple
+        Parse price string into (price, currency) tuple.
+
         Returns (None, None) if parsing fails
         """
         if not price_str or pd.isna(price_str):