Python检查数据中的正/负数

def check_positive_negative_numbers(data):
    positive_numbers = []
    negative_numbers = []

    for num in data:
        if num > 0:
            positive_numbers.append(num)
        elif num < 0:
            negative_numbers.append(num)

    return positive_numbers, negative_numbers

data = [1, -2, 3, -4, 5]
positive_numbers, negative_numbers = check_positive_negative_numbers(data)

print("Positive numbers:", positive_numbers)
print("Negative numbers:", negative_numbers)

Positive numbers: [1, 3, 5]
Negative numbers: [-2, -4]