当可能的类型是float或string时，如何将模板展开为string？

template = "The value is: {}"

# 当变量为float类型时
value = 3.14
result = template % value
print(result)
# 输出：The value is: 3.14

# 当变量为string类型时
value = "Hello"
result = template % value
print(result)
# 输出：The value is: Hello

template = "The values are: {} and {}"

# 当变量为float类型时
value1 = 3.14
value2 = 2.718
result = template % (value1, value2)
print(result)
# 输出：The values are: 3.14 and 2.718

# 当变量为string类型时
value1 = "Hello"
value2 = "World"
result = template % (value1, value2)
print(result)
# 输出：The values are: Hello and World