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from functools import cached_property

import time

class DataAnalyzer:

def __init__(self, dataset):

self.dataset = dataset

@cached_property

def complex_analysis(self):

print("Running expensive analysis...")

time.sleep(2) # Simulating heavy computation

return sum(x**2 for x in self.dataset)

# Usage

analyzer = DataAnalyzer(range(1000000))

print("First access:")

t1 = time.time()

result1 = analyzer.complex_analysis

t2 = time.time()

print(f"Result: {result1}, Time: {t2-t1:.2f}s")

print("\nSecond access:")

t1 = time.time()

result2 = analyzer.complex_analysis

t2 = time.time()

print(f"Result: {result2}, Time: {t2-t1:.2f}s")