sex = input("please input your gender:")if sex == "man":    print("I would like to makefriend with you")elif sex == "girl":    print("I would like have a little monkey with you")else:    print("are you kidding me?")

python里面采用强制缩进，来指定作用域。类似于java里面的{}括起来的部分。如果没有缩进的话，python就会语法错误。

python只会认为要执行if下有缩进的那些语句。