Python中elif语句的语法错误

Question

我用Python2.7编写的这段代码有点麻烦。它给出了elif语句的语法错误，但是没有解释，我在代码中找不到任何合理的错误。(typeline是我定义的一种方法。)

num = randrange(-25,15)
""" Toxic """
if num >= -25 and num < -10:
        responses = ["Ugh, nasty.", "That was absolutely disgusting.", "My stomach feels like it's going to explode.", "Pardon me if I puke."]
        typeline(responses[randrange(0,4)], "jack")
        return [num, "Jack ate a VERY TOXIC FRUIT and survived.", "Jack ate a VERY TOXIC FRUIT and died."]
""" Mildly poisonous """
elif num >= -10 and num < 0: """ SYNTAX ERROR HERE """
        responses = ["Yuck", "It's kinda bitter.", "Tastes like an unripe banana.", "It's not so bad."]
        typeline(responses[randrange(0,4)], "jack")
        return [num, "Jack ate a MILDLY TOXIC FRUIT and survived.", "Jack ate a MILDLY TOXIC FRUIT and died."]
""" Healthy """
else:
        responses = ["Definitely not too bad", "It's almost kind of tasty!", "Should I make a jam out of this?", "This is my new favorite fruit."]
        typeline(responses[randrange(0,4)], "jack")
        return [num, "Jack ate a HEALTHY FRUIT and was rescued.", "Jack ate HEALTHY FRUIT and survived."]

错误：

  File "<stdin>", line 9
    elif num >= -10 and num < 0:
       ^
SyntaxError: invalid syntax

Answer 1

在elif之前有一个未缩进的三引号字符串文本的右转。

""" Mildly poisonous """
elif num >= -10 and num < 0:

"""..."""字符串文字是，而不是多行注释。它们会创建字符串，而且只有当您忽略生成的string对象时，Python才会忽略该行。它们仍然是Python语法的一部分；使用它们时不能忽略缩进规则。

使用适当的#注释：

# Toxic
if num >= -25 and num < -10:
    # ...
# Mildly poisonous
elif num >= -10 and num < 0:
    # ...
# Healthy
else:
    # ...

由于注释被语法完全忽略，所以它们如何缩进并不重要。

如果必须将""" ... """三元引号字符串用作“块注释”，则必须将它们缩进以成为放置在其中的if或elif块的一部分：

""" Toxic """
if num >= -25 and num < -10:
    # ...
    """ Mildly poisonous """
elif num >= -10 and num < 0:
    # ...
    """ Healthy """
else:
    # ...