Python在txt文件中读取\\ n和\\ r

Question

I have just edited a txt file (file0.txt) with Notepad++ with just clicking the Enter key. That´s it, just one line.

I have reviewed several StackOverflow questions/answers that relate the differences between \\r and \\n. I have confirmed, even visually on the Notepad++ text editor window, that on a Windows OS, a click on the Enter key introduces two ASCII characters, CRLF(\\r\\n).

So, why in the world, when I print the line of the previously edited file using this Python 3.4 code:

ffile=open('file0.txt')

for line in ffile:
    print(ascii(line))

do I get

'\n'

in the terminal instead of:

'\r\n'

Answer 1

Behind the scenes:

ffile=open('file0.txt')

open creates an instance of TextIOWrapper

>>> print(ffile)                                                                                                       
<_io.TextIOWrapper name='/tmp/asdf' mode='r' encoding='UTF-8'>

From the docs of TextIOWrapper :

Lines in the input can end in '\\n', '\\r', or '\\r\\n', and these are translated into '\\n' before being returned to the caller