python3中的布尔型变量赋值问题

x = "There are %d types of people." % 10

binary = "binary"

do_not = "don't"

y = "Those who know %s and those who %s." % (binary,do_not)

print (x)

print (y)

print ("I said: %r." % x)

print (("I also said: '%s'." % y)

hilarious = False

joke_evaluation = "Isn't that joke so funny?! %r"

print (joke_evaluation % hilarious)

w = "This is thhe left side of..."

e = "a string with a right side."

print (w + e)

比如在python3中这段代码运行不了，错误提示如下

  File "ex6.py", line 12

    hilarious = False

            ^

SyntaxError: invalid syntax

但是如果我单独把后面提取出来

hilarious = False

joke_evaluation = "Isn't that joke so funny?! %r"

print (joke_evaluation % hilarious)

w = "This is thhe left side of..."

e = "a string with a right side."

这样是可以运行的

这其中对于hilarious = False的赋值是有什么要求的么？