Create app.py

app.py

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+"""
+Calorie & Macronutrient Nutrition Calculator
+Hugging Face Spaces Deployment Version
+No APIs | No ML | Pure Python Logic
+"""
+
+import gradio as gr
+
+
+# ==============================
+# Calculation Functions
+# ==============================
+
+def calculate_bmr(age, gender, weight, height):
+    """Calculate Basal Metabolic Rate using Mifflin-St Jeor equation."""
+    if gender == "Male":
+        return 10 * weight + 6.25 * height - 5 * age + 5
+    else:
+        return 10 * weight + 6.25 * height - 5 * age - 161
+
+
+def get_activity_factor(activity_level):
+    """Return activity multiplier."""
+    factors = {
+        "Sedentary": 1.2,
+        "Light": 1.375,
+        "Moderate": 1.55,
+        "Active": 1.725,
+        "Very Active": 1.9
+    }
+    return factors.get(activity_level, 1.2)
+
+
+def adjust_calories(tdee, goal):
+    """Adjust calories based on goal."""
+    if goal == "Weight Loss":
+        return tdee - 500
+    elif goal == "Muscle Gain":
+        return tdee + 300
+    else:
+        return tdee
+
+
+def macro_distribution(goal):
+    """Return macro percentages."""
+    ratios = {
+        "Weight Loss": (0.40, 0.30, 0.30),
+        "Maintenance": (0.50, 0.25, 0.25),
+        "Muscle Gain": (0.50, 0.30, 0.20)
+    }
+    return ratios.get(goal)
+
+
+def calculate_macros(calories, goal):
+    """Calculate macro grams and calories."""
+    carb_pct, protein_pct, fat_pct = macro_distribution(goal)
+
+    carb_cal = calories * carb_pct
+    protein_cal = calories * protein_pct
+    fat_cal = calories * fat_pct
+
+    carb_g = carb_cal / 4
+    protein_g = protein_cal / 4
+    fat_g = fat_cal / 9
+
+    return carb_g, protein_g, fat_g, carb_cal, protein_cal, fat_cal
+
+
+def calculate_bmi(weight, height):
+    """Calculate BMI and classification."""
+    height_m = height / 100
+    bmi = weight / (height_m ** 2)
+
+    if bmi < 18.5:
+        category = "Underweight"
+    elif 18.5 <= bmi < 25:
+        category = "Normal weight"
+    elif 25 <= bmi < 30:
+        category = "Overweight"
+    else:
+        category = "Obese"
+
+    return bmi, category
+
+
+def meal_suggestions(goal):
+    """Provide meal suggestions."""
+    suggestions = {
+        "Weight Loss": (
+            "3–4 meals per day",
+            "Focus on high-protein meals and fiber-rich foods. Spread protein evenly."
+        ),
+        "Maintenance": (
+            "3–5 meals per day",
+            "Maintain balanced meals with carbs, protein and healthy fats."
+        ),
+        "Muscle Gain": (
+            "4–6 meals per day",
+            "Eat protein every 3–4 hours. Include carbs around workouts."
+        )
+    }
+    return suggestions.get(goal)
+
+
+# ==============================
+# Main App Logic
+# ==============================
+
+def nutrition_calculator(age, gender, weight, height, activity, goal):
+
+    # Input validation
+    if age < 15 or age > 100:
+        return "❌ Age must be between 15 and 100."
+    if weight < 20 or weight > 200:
+        return "❌ Weight must be between 20 and 200 kg."
+    if height < 100 or height > 250:
+        return "❌ Height must be between 100 and 250 cm."
+
+    bmr = calculate_bmr(age, gender, weight, height)
+    tdee = bmr * get_activity_factor(activity)
+    adjusted_calories = adjust_calories(tdee, goal)
+
+    carb_g, protein_g, fat_g, carb_cal, protein_cal, fat_cal = calculate_macros(adjusted_calories, goal)
+    bmi, bmi_category = calculate_bmi(weight, height)
+    meals, tip = meal_suggestions(goal)
+
+    result = f"""
+## 📊 Nutrition Results
+
+### 🔥 Daily Energy
+- **BMR:** {bmr:.0f} kcal/day
+- **TDEE:** {tdee:.0f} kcal/day
+- **Target Calories ({goal}):** {adjusted_calories:.0f} kcal/day
+
+---
+
+### 🍎 Macronutrient Breakdown
+
+| Macro | Grams | Calories |
+|-------|-------|----------|
+| Carbohydrates | {carb_g:.0f} g | {carb_cal:.0f} kcal |
+| Protein | {protein_g:.0f} g | {protein_cal:.0f} kcal |
+| Fat | {fat_g:.0f} g | {fat_cal:.0f} kcal |
+
+---
+
+### 🧮 Body Mass Index (BMI)
+- **BMI:** {bmi:.1f}
+- **Category:** {bmi_category}
+
+---
+
+### 🍽️ Meal Recommendation
+- Suggested Meals Per Day: **{meals}**
+- Tip: {tip}
+
+---
+
+⚠️ This calculator provides general guidance only.
+"""
+
+    return result
+
+
+# ==============================
+# Gradio Interface
+# ==============================
+
+with gr.Blocks(theme=gr.themes.Soft()) as demo:
+
+    gr.Markdown("# 🥗 Calorie & Macronutrient Calculator")
+    gr.Markdown("Estimate your daily calorie needs, macros, BMI and meal suggestions.")
+
+    with gr.Row():
+        with gr.Column():
+            age = gr.Number(label="Age", value=25)
+            gender = gr.Radio(["Male", "Female"], label="Gender", value="Male")
+            weight = gr.Number(label="Weight (kg)", value=70)
+            height = gr.Number(label="Height (cm)", value=170)
+            activity = gr.Dropdown(
+                ["Sedentary", "Light", "Moderate", "Active", "Very Active"],
+                label="Activity Level",
+                value="Moderate"
+            )
+            goal = gr.Dropdown(
+                ["Weight Loss", "Maintenance", "Muscle Gain"],
+                label="Goal",
+                value="Maintenance"
+            )
+
+            calculate_btn = gr.Button("Calculate")
+            clear_btn = gr.Button("Reset")
+
+        with gr.Column():
+            output = gr.Markdown()
+
+    calculate_btn.click(
+        nutrition_calculator,
+        inputs=[age, gender, weight, height, activity, goal],
+        outputs=output
+    )
+
+    clear_btn.click(lambda: "", outputs=output)
+
+
+# Required for Hugging Face Spaces
+if __name__ == "__main__":
+    demo.launch(server_name="0.0.0.0", server_port=7860)
+