type_of_people=10
x=f"There are {type_of_people} types of people "
binary="binary"
do_not="don't"
y=f"Those who know {binary} and those who {do_not}."
print(x)
print(y)
hilarious=False
joke_evaluation="Isn't that joke o funny?!{}"
print(joke_evaluation.format(hilarious))#format接字符串,必须使用{}
w="This is the left side of ..."
e="a string with a right side"