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Predict the Pipeline Output

Beginner · Predict the output · from Python map(), filter(), reduce(), and Higher-Order Functions

From the lesson: Python map(), filter(), reduce(), and Higher-Order Functions

Picture an assembly line in a factory. Raw materials enter at one end. At the first station, each piece is shaped. At the next station, defective pieces are removed. At the final station, all the good pieces are combined into one finished product.

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Read this code and predict the output. Then write a print() statement that produces the exact same output.

numbers = [10, 25, 30, 45, 50]
result = list(map(lambda x: x // 10, filter(lambda x: x >= 30, numbers)))
print(result)

Think step by step: what does filter keep, then what does map do to each item?

# Print the exact output

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