Re[4]: backslashes and r-strings r"abc"

On Mon, 26 Jul 2004 21:33:09 -0700 Mark Hahn <[email protected]> wrote:

> Lenard Lindstrom wrote:
> 
> > > One thing that bothers me about Python's r-strings is that they are 
> > > supposed to pass backslashes but they throw an exception if 
> > you have a 
> > > backslash as the last character.  This makes them useless 
> > in one place 
> > > I've always wanted to use them:
> > > 
> > > 	r"c:\windows directory\"  # throws Python exception
> > > 
> > > So maybe Prothon could at least fix that problem.  Does 
> > anyone see any 
> > > reason to preserve Python's restriction on not having a 
> > backslash as 
> > > the last character of a r-string?
> > >
> > Go ahead. Backslash for line continuation in a raw string is 
> > broken for both Prothon and Python anyways:
> > 
> > Python 2.4a1 (#54, Jul  8 2004, 11:30:13) [MSC v.1310 32 bit 
> > (Intel)] on win32 Type "help", "copyright", "credits" or 
> > "license" for more information.
> > >>> r"abc\
> > ... def"
> > 'abc\\\ndef'
> 
> How can a backslash do continuation if backslashes are disabled in a
> r-string?
> 
> > Prothon 0.1 Interactive Console, Build 742, Jul 15 2004 
> > (Ctrl-D to exit)
> > O>> r"abc\
> > ... def"
> > Lexical error: unterminated quote string
> > 
> > By the way, what happened to string literal concatenation? I 
> > thought it was on the todo list.
> 
> It IS on the to-do list. :-)  I've been busy writing my talk and rewriting
> the object code preparing for the new garbage collector.
>
Okay. No rush.
 
> > Prothon 0.1 Interactive Console, Build 742, Jul 15 2004 
> > (Ctrl-D to exit)
> > O>> print("abc" "def")
> > 
> > Parse Error: expecting `')'' or `',''
> > --- col: 18
> > 
> > Uncaught exception:
> > Parse Error.
> > 
> > String literal concatenation replaced almost all uses of line 
> > continuation within strings unnecessary. The only use I have 
> > found for line continuation is at the start of triple-quoted strings.
> > 
> > print("""\
> > The following is arranged
> > as to how it will appear.
> > """)
> 
> The you shouldn't care if they don't work in r-strings.
> 

No.