add show nutrient method

app/model.py

@@ -11,3 +11,37 @@ class FoodSearch:
         results = self.cursor.fetchall()
         
         return results
+    
+import sqlite3
+
+class FoodNutrient:
+    def __init__(self, db_path):
+        self.conn = sqlite3.connect(db_path)
+        self.cursor = self.conn.cursor()
+        self.nutrient_columns = [
+            'energy-kcal_100g',
+            'fat_100g',
+            'saturated-fat_100g',
+            'cholesterol_100g',
+            'carbohydrates_100g',
+            'fiber_100g',
+            'proteins_100g',
+            'salt_100g',
+            'sodium_100g',
+            'potassium_100g',
+            'calcium_100g',
+            'iron_100g',
+            'vitamin-a_100g',
+            'vitamin-c_100g'
+        ]
+
+    def throw_nutrient(self, index_val):
+        nutrient_cols = ", ".join([f"`{col}`" for col in self.nutrient_columns])
+        query = f"SELECT {nutrient_cols} FROM food_data WHERE `index` = {index_val}"
+        self.cursor.execute(query)
+        nutrient_data = self.cursor.fetchone()
+
+        return {col: nutrient_data[i] for i, col in enumerate(self.nutrient_columns)}
+
+fn = FoodNutrient('food_data.db')
+print(fn.throw_nutrient(3))