如何在多个假设中同时应用？

def process_data(data):
    if data is None:
        return "No data provided"
    elif isinstance(data, int):
        if data > 0:
            return "Positive integer"
        elif data < 0:
            return "Negative integer"
        else:
            return "Zero"
    elif isinstance(data, str):
        if len(data) > 10:
            return "Long string"
        else:
            return "Short string"
    else:
        return "Unknown data type"

# 测试示例
print(process_data(None))       # 输出: No data provided
print(process_data(5))          # 输出: Positive integer
print(process_data(-3))         # 输出: Negative integer
print(process_data(0))          # 输出: Zero
print(process_data("hello"))    # 输出: Short string
print(process_data("this is long"))  # 输出: Long string
print(process_data([1, 2, 3]))  # 输出: Unknown data type