Python is a good language.
We all like it.

7 spaces, 0 numbers, 32 letters, 3 other characters.

以 EOF 结束表示你需要处理一个异常 EOFError
多行文本应该这样读：

#!/usr/bin/python3 

stopword = ''
stri = ''
try:
    for line in iter(input, stopword):
        stri += line + '\n'
except EOFError:
   pass
stri = stri[0:-1]
# do something...