Python 3.x Python elif无效语法

我试图使这个elif语句，但它不断向我显示这个错误无效语法 谁能给我解释一下，谢谢

代码：

错误：

File "<ipython-input-15-6032d446949e>", line 7
    elif:
        ^
SyntaxError: invalid syntax

根据协议，elif的使用方式如下：

尝试：

---

如果y 这是您的完整代码

x = int(input("Hello, how old are you? "))
y, u, i, o, p, l, b, c, v = 0, 12, 13, 19, 20, 30, 31, 64, 65

try:
        x == int
        if y < x <= u:
                print("Kid")
        elif i < x <= o:
                print("Teenager")
        elif p < x <= l:
                print("Young Adult")
        elif b < x <= c:
                print("Adult")
        else:
                print("Senior")
except:
    print("Is that an age?")

如果。。。需要一个条件！

if(condition):
   statement
elif(condition):
   statement

x = int(input("Hello, how old are you? "))
y, u, i, o, p, l, b, c, v = 0, 12, 13, 19, 20, 30, 31, 64, 65

try:
        x == int
        if y < x <= u:
                print("Kid")
        elif i < x <= o:
                print("Teenager")
        elif p < x <= l:
                print("Young Adult")
        elif b < x <= c:
                print("Adult")
        else:
                print("Senior")
except:
    print("Is that an age?")