results = []
for x in data:
    # For EACH iteration, Python must:
    # 1. Fetch x from memory
    # 2. Check the type of x
    # 3. Look up what "+" means for that type
    # 4. Execute the addition
    # 5. Append to the list (which may require memory reallocation)
    results.append(x + 1)

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