RE: Re[2]: backslashes and r-strings r"abc"

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.

> 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.