带字符串的python if语句

如果以前有人问过这个问题，我很抱歉，但我不知道为什么我的代码不起作用，我需要一些帮助。谢谢（顺便提一下，Python 3.5.1）

您不能将变量设置为[…]中的比较表达式

。所以

Name=str(input("Your name is? "))
print("Hello,",Name,"!")
Age=int(input("And how old might you be? "))
print("So you are",Age,"years old?")
print("So on your next birthday, you will be",Age+1,"?")
agecorrect=str(input("Yes or no? "))
yes= in ["Yes","yes","Y","y","yes.","Yes."]
no= in ["No","no","N","n","no.","No."]
if agecorrect=yes:
    print("Yes, I was right!")
else
if agecorrect=no:
    realage=int(input("So your real age on your next birthday will be? "))
    print("So you're actually going to be",realage,"? Good to know!")
else
print("I don't understand... I asked for a yes or no answer.")

无效。您只需在列表中设置

yes

和

no

：

yes= in ["Yes","yes","Y","y","yes.","Yes."]

如果“是”中的“年龄正确”，则可以使用

：

yes = ["Yes","yes","Y","y","yes.","Yes."]
no = ["No","no","N","n","no.","No."]

您还丢失了
：
后面的
否则
检查应始终使用
=
，而不是
=
，这是分配

始终使用

if agecorrect in yes:
    print("Yes, I was right!")
elif agecorrect in no:
    realage=int(input("So your real age on your next birthday will be? "))
    print("So you're actually going to be",realage,"? Good to know!")
else:
    print("I don't understand... I asked for a yes or no answer.")

而不是

if y == 'yes':

如果您编写上面的代码，Python将抛出一个错误，但是其他语言只需将值赋给
y
，然后运行if语句。

这是您的“固定”代码：

错误消息将清楚地告诉您，
yes=in…
in[“yes”、“yes”、“Y”、“Y”、“yes.”、“yes.”]
这是什么？@marounnaroun这是所有可能的答案yes@SirParselot-当然。。但是语法不是有效的变量包含值，而不是语法的部分块。非常感谢，很抱歉出现了错误question@Nezzeh没关系，从错误中吸取教训并改进未来的帖子更重要。
elif
而不是
else if
？@LexyStardust是的，我自己也意识到了这一点，于是就去了。谢谢你，我会记住的谢谢你-而且“你是”是一个陈述，而不是一个问题你也可以做
agecorrect=question in yes
@ForceBru，编辑，谢谢
if y = 'yes':

# don't use uppercase in variables names,
# prefer underscores over camelCase or dashes
# leave space before and after assignment, there are exceptions of this rule
# but not here ;)
name = str(input("Your name is? "))
print("Hello {}!".format(name))
age = int(input("And how old might you be? "))

# english grammar man!
print("So are you {} years old?".format(age))
print("So on your next birthday, you will be {}?".format(age + 1))
agecorrect = str(input("Yes or no? "))

# in is keyword and you use it to check whether item is in collection
# or its not
# please don't try to attach it to variable
# also use space after putting comma
yes = ["Yes", "yes", "Y", "y", "yes.", "Yes."]
no = ["No", "no", "N", "n", "no.", "No."]
if agecorrect in yes:
    print("Yes, I was right!")

# you forgot about colon
elif agecorrect in no:
    realage = int(input("So your real age on your next birthday will be? "))
    print("So you're actually going to be {}? Good to know!".format(realage))
else:
    print("I don't understand... I asked for a yes or no answer.")

yes = ("Yes","yes","Y","y","yes.","Yes.")
question = input("Yes or no? ")
agecorrect = question in yes
if agecorrect:
    # ...