Organizing code

# helpers.py

def calculate_total(quantity, price):
    """Calculate total for a single item"""
    return quantity * price

def format_currency(amount):
    """Format number as currency"""
    return f"${amount:,.2f}"

# analyzer.py
import pandas as pd
from helpers import calculate_total, format_currency

# Read data
df = pd.read_csv('data/sales.csv')

# Calculate total for each row
totals = []
for index, row in df.iterrows():
    total = calculate_total(row['quantity'], row['price'])
    totals.append(total)

# Add totals to our data
df['total'] = totals

# Display with formatted totals
print("Sales Data:")
for index, row in df.iterrows():
    formatted_total = format_currency(row['total'])
    print(f"{row['product']}: {formatted_total}")

# Show grand total
grand_total = df['total'].sum()
formatted_grand_total = format_currency(grand_total)
print(f"\nGrand Total: {formatted_grand_total}")