New to python had a problem

hello,everyone I was having time to learn python so i started learning it from day before yesterday,now I am trying to make snake game from curses module and I ran into A TROUBLE, figured someone from here would lend me some of their experience regarding this
the document is the photograph of the code fragment
Document 8.pdf

class Snake(object):
def init(self):
self.x='Hiss!'
def method_a(self,foo):
print(self.x +' '+ foo)

snake = Snake()
snake.method_a('Says the snake')

the above code fragment is having an error
upon trying to run it the terminal gives the following

Traceback (most recent call last):
File "hc.py", line 31, in
snake.method_a('Says the snake')
File "hc.py", line 28, in method_a
print(self.x +' '+ foo)
AttributeError: 'Snake' object has no attribute 'x'

can't find where the error is so i request you guys to please help me if you know any thing regarding this

and sorry i forgot the most important part of info iam using python 3.7.2 64 bit on windows 7

先从 issue 正文中的 Snake 类和 traceback 开始，然后检查链接的 Document 8.pdf，以找到原始代码片段。使用 Python 3.7.2 重现该示例，并确认初始化会创建 method_a 使用的属性，且不会产生所报告的 AttributeError。