pythonintermediate10 minutes

Build a Function to Group and Summarize Sales Data by Category

Create a Python function that takes a list of sales records and returns a summary dictionary grouping total sales by product category.

Challenge prompt

Write a function named 'summarize_sales_by_category' that accepts a list of dictionaries. Each dictionary represents a sale with keys 'product', 'category', and 'amount'. The function should return a dictionary where each key is a category and the value is the sum of amounts for that category.

Guidance

• Iterate over each sale record in the input list.
• Use a dictionary to accumulate the sum of amounts keyed by category.
• Ensure the function works efficiently for any number of sales records.

Hints

• Use the dict.get method to provide a default value when adding amounts.
• Remember to initialize the category sum to zero the first time you encounter it.

Starter code

def summarize_sales_by_category(sales):
    # Your code here
    pass

Expected output

{'Electronics': 450, 'Clothing': 300, 'Books': 150}

Core concepts

dictionaryloopsaggregation

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