[Tutor] Reading from a file
Sat, 18 Aug 2001 02:29:07 -0700 (PDT)
On Fri, 17 Aug 2001, Israel Evans wrote:
> this may not be the best way to do it but it seems to work... I'm rather new
> to this to.
> >>> line = """"CVR",1,2"""
> >>> info = line.split(',')
> >>> info
> ['"CVR"', '1', '2']
> >>> info.remove(info[len(info)-1])
> >>> info
> ['"CVR"', '1']
> I'm just removing the last item in the list. The /012 is probably
> some sort of line ending like \n? I'm guessing.
Here's a sample interpreter session, annotated for your amusement:
10 # Hmm... I expected to see 12.
>>> ord('\r') # Maybe it's the carriage return character
13 # Nope!
# ... oh, silly me.
# [thunk on the head]
>>> 012 # I forgot \012 was in octal...
10 # Ah, that's better.
So yes, '\012' is the newline '\n' character. In older versions of
Python, unusual ASCII characters would be repr()esented in octal
notation. Here's the paragraph from the "What's New in Python
that talks about this:
"""Applying repr() to strings previously used octal escapes for
non-printable characters; for example, a newline was '\012'. This was a
vestigial trace of Python's C ancestry, but today octal is of very little
practical use. Ka-Ping Yee suggested using hex escapes instead of octal
ones, and using the \n, \t, \r escapes for the appropriate characters, and
implemented this new formatting."""