如何使用函数将变量归入类别

def categorize_variable(x):
    if isinstance(x, int):
        if x > 0:
            return "A"
        else:
            return "B"
    elif isinstance(x, str):
        if len(x) > 5:
            return "A"
        else:
            return "B"
    else:
        return "Unknown"

# 示例调用
print(categorize_variable(10))         # 输出：A
print(categorize_variable(-5))         # 输出：B
print(categorize_variable("Hello"))    # 输出：A
print(categorize_variable("Hi"))       # 输出：B
print(categorize_variable(3.14))       # 输出：Unknown